Roseanne Barr is under fire for appearing to promote a far-right conspiracy theory about the Parkland school shooting activist David Hogg.

In a since-deleted tweet, Barr wrote the words "NAZI SALUTE" in response to a conspiracy theorist's post that tagged Hogg.

Barr's tweet seemed to reference a debunked conspiracy that Hogg raised a Nazi salute at a March for Our Lives rally on Saturday.

Roseanne Barr sparked controversy this week for appearing to promote a far-right conspiracy theory about the Parkland shooting student-activist David Hogg.

On Tuesday evening, just before the revival of her ABC sitcom "Roseanne" premiered, Barr tweeted the words "NAZI SALUTE" in response to a Twitter user who tagged Hogg in a tweet. She later deleted her tweet.

ICYMI Roseanne replied to a David Hogg conspiracy theorist who tagged the actual boy, but then ABC made her delete it. Don't worry, here's a screenshot: pic.twitter.com/yftDrSdq6b — Adam Sass 🏝🌈 (@TheAdamSass) March 27, 2018

Barr, a vocal Trump supporter with a history of promoting right-wing conspiracy theories, seemed to be referencing a far-right conspiracy theory that Hogg raised a Nazi salute at a March for Our Lives rally on Saturday.

12 PHOTOS Parkland shooting survivor David Hogg See Gallery Parkland shooting survivor David Hogg David Hogg, a student and shooting survivor from the Marjory Stoneman Douglas High School in Parkland, Florida, addresses the conclusion of the "March for Our Lives" event demanding gun control after recent school shootings at a rally in Washington, U.S., March 24, 2018. REUTERS/Jonathan Ernst David Hogg, a student at the Marjory Stoneman Douglas High School, site of a February mass shooting which left 17 people dead in Parkland, Florida, thrusts his fist in the air as he speaks during the "March for Our Lives" event demanding gun control after recent school shootings at a rally in Washington, U.S., March 24, 2018. REUTERS/Aaron P. Bernstein David Hogg, a student at the Marjory Stoneman Douglas High School, site of a February mass shooting which left 17 people dead in Parkland, Florida, speaks as students and gun control advocates hold the "March for Our Lives" event demanding gun control after recent school shootings at a rally in Washington, U.S., March 24, 2018. REUTERS/Jonathan Ernst David Hogg, a student at the Marjory Stoneman Douglas High School, site of a February mass shooting which left 17 people dead in Parkland, Florida, speaks as students and gun control advocates hold the "March for Our Lives" event demanding gun control after recent school shootings at a rally in Washington, U.S., March 24, 2018. REUTERS/Aaron P. Bernstein David Hogg, a student at the Marjory Stoneman Douglas High School, site of a February mass shooting which left 17 people dead in Parkland, Florida, thrusts his fist in the air as he speaks during the "March for Our Lives" event demanding gun control after recent school shootings at a rally in Washington, U.S., March 24, 2018. REUTERS/Jonathan Ernst David Hogg, a senior from Marjory Stoneman Douglas High School, speaks during a rally with Thurgood Marshall Academy students in advance of Saturday's March for Our Lives event in Washington, U.S. March 22, 2018. REUTERS/Eric Thayer Emma Gonzalez (L), David Hogg (C) and Cameron Kasky, survivors of the February mass shooting at the Marjory Stoneman Douglas High School, pause for a moment of silence for the victims of the shooting at Great Mills High School in Maryland, before discussing their "#NeverAgain" push to end school shootings at Harvard University's Kennedy School of Government in Cambridge, Massachusetts, U.S., March 20, 2018. REUTERS/Brian Snyder Emma Gonzalez (L) and David Hogg, survivors of the February mass shooting at the Marjory Stoneman Douglas High School, discuss their "#NeverAgain" push to end school shootings at Harvard University's Kennedy School of Government in Cambridge, Massachusetts, U.S., March 20, 2018. REUTERS/Brian Snyder David Hogg, a senior at Marjory Stoneman Douglas High School, speaks at a rally calling for more gun control three days after the shooting at his school, in Fort Lauderdale, Florida, U.S. February 17, 2018. REUTERS/Jonathan Drake Marjory Stoneman Douglas student David Hogg speaks during March for Our Lives to demand stricter gun control laws on Saturday, March 24, 2018, in Washington, D.C. (Mike Stocker/Sun Sentinel/TNS via Getty Images) WASHINGTON, DC - MARCH 24: Marjory Stoneman Douglas High School student David Hogg speaks onstage at March For Our Lives on March 24, 2018 in Washington, DC. (Photo by Paul Morigi/Getty Images for March For Our Lives) WASHINGTON, DC - MARCH 23: Dan Rather hosts a SiriusXM Roundtable Special Event with Parkland, Florida, Marjory Stoneman Douglas High School Students and activists Emma Gonzalez, David Hogg (pictured), Cameron Kasky, Alex Wind, and Jaclyn Corin at SiriusXM Studio on March 23, 2018 in Washington, DC. (Photo by Larry French/Getty Images for SiriusXM) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

As Mic noted, a number of Twitter users, including Chrissy Teigen, criticized Barr for the tweet, while some called out ABC for giving Barr a platform with her revived sitcom.

Argh. Hit show on ABC. we have reached peak normalization. pic.twitter.com/OnEmeh3oxW — chrissy teigen (@chrissyteigen) March 29, 2018

Dear Lord @therealroseanne you know this is most likely a troll meme account, right? You're entitled to your opinion but this is low even for a Trump supporter. — Alec (@bright_boy09) March 27, 2018

NAZI SALUTE?? REALLY?? Please don't disparage others to try to make your wildly inaccurate point. pic.twitter.com/UqoZITwGYy — Stuck_in_the_440 (@dabadass419) March 27, 2018

Well keep sharing it. @ABC if you keep giving @therealroseanne a platform you are condoning her harassing survivors of a school shooting.#BoycottRoseannepic.twitter.com/7fTYeZJ8iV — Sidney Joel Stokes (@TheSidJoShow) March 27, 2018

Barr has previously used her Twitter page to promote debunked far-right conspiracies including Pizzagate and the conspiracy of a "cover-up" in the death of former Democratic National Convention staffer Seth Rich.

ABC did not immediately respond to a request for comment on the matter.

23 PHOTOS 'Roseanne' revival See Gallery 'Roseanne' revival ROSEANNE - 'Go Cubs' - The Conners can't pay their Wi-Fi bill, so they befriend their new neighbors to use the internet for Mary to Skype with mom Geena, who is stationed in Afghanistan. Meanwhile, Dan loses an important job and D.J. admits post-military life has been hard, so they come up with a plan to make extra money, on the seventh episode of the revival of 'Roseanne,' TUESDAY, MAY 8 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose/ABC via Getty Images) SARA GILBERT, ROSEANNE BARR, ALAIN WASHNEVSKY, ANNE BEDIAN ROSEANNE - 'No Country for Old Women' - After Beverly gets kicked out of the nursing home, Roseanne and Jackie fight over who will take care of their mother. Meanwhile, Mark's creative touch with building a birdhouse for Dan's customer is more than Dan can handle, but Darlene defends her son, on the sixth episode of the revival of 'Roseanne,' TUESDAY, MAY 1 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Greg Gayne/ABC via Getty Images) ESTELLE PARSONS, LAURIE METCALF ROSEANNE - 'Eggs Over, Not Easy' - A crucial moment for Becky's surrogacy arrangement forces her and Darlene to critically assess each other's lives. Meanwhile, an animal rescue organization rejects Jackie's application to adopt a puppy; and Roseanne makes a plan to change their mind, on the fourth episode of the revival of 'Roseanne,' TUESDAY, APRIL 10 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose/ABC via Getty Images) LAURIE METCALF, LECY GORANSON, SARAH CHALKE ROSEANNE - 'Netflix & Pill' - After celebrating their 45th anniversary, Roseanne reveals to Dan a bigger problem with her bad knee. Meanwhile, Crystal announces her retirement as a waitress at the casino, and Becky and Darlene compete for the job which has full-time benefits, on the eighth episode of the revival of 'Roseanne,' TUESDAY, MAY 15 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose via Getty Images) ROSEANNE BARR, JOHN GOODMAN ROSEANNE - 'Darlene v. David' - David unexpectedly shows up for Harris' birthday after being absent for years, forcing Darlene to re-examine their relationship and the rest of the family. Meanwhile, Bev temporarily moves into the Conner home after an incident at the nursing home prevents her from returning, on the fifth episode of the revival of 'Roseanne,' TUESDAY, APRIL 17 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Greg Gayne via Getty Images) LECY GORANSON, SARA GILBERT ROSEANNE - 'Go Cubs' - The Conners can't pay their Wi-Fi bill, so they befriend their new neighbors to use the internet for Mary to Skype with mom Geena, who is stationed in Afghanistan. Meanwhile, Dan loses an important job and D.J. admits post-military life has been hard, so they come up with a plan to make extra money, on the seventh episode of the revival of 'Roseanne,' TUESDAY, MAY 8 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose/ABC via Getty Images) JOHN GOODMAN, MICHAEL FISHMAN ROSEANNE - 'Netflix & Pill' - After celebrating their 45th anniversary, Roseanne reveals to Dan a bigger problem with her bad knee. Meanwhile, Crystal announces her retirement as a waitress at the casino, and Becky and Darlene compete for the job which has full-time benefits, on the eighth episode of the revival of 'Roseanne,' TUESDAY, MAY 15 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose via Getty Images) ROSEANNE BARR ROSEANNE - 'Go Cubs' - The Conners can't pay their Wi-Fi bill, so they befriend their new neighbors to use the internet for Mary to Skype with mom Geena, who is stationed in Afghanistan. Meanwhile, Dan loses an important job and D.J. admits post-military life has been hard, so they come up with a plan to make extra money, on the seventh episode of the revival of 'Roseanne,' TUESDAY, MAY 8 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose/ABC via Getty Images) ROSEANNE BARR, JAYDEN REY, SARA GILBERT, LAURIE METCALF ROSEANNE - ABC's 'Roseanne' stars Ames McNamara as Mark, Sara Gilbert as Darlene Conner, Laurie Metcalf as Jackie Harris, Emma Kenney as Harris Conner, Jayden Rey as Mary, Roseanne Barr as Roseanne Conner, Michael Fishman as D.J. Conner, John Goodman as Dan Conner, Lecy Goranson as Becky Conner, and Sarah Chalke as Andrea. (Robert Trachtenberg/ABC via Getty Images) ROSEANNE - 'Roseanne Gets the Chair' - Roseanne's clash with Darlene over how she's raising her kids - especially Harris - reaches a breaking point; while Dan tries to help Roseanne with her bad knee by getting her an elevator chair, which she refuses to use because she doesn't want to admit getting old, on the second episode of the revival of 'Roseanne,' TUESDAY, APRIL 3 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose via Getty Images) ROSEANNE BARR, JOHN GOODMAN ROSEANNE - 'Roseanne Gets the Chair' - Roseanne's clash with Darlene over how she's raising her kids - especially Harris - reaches a breaking point; while Dan tries to help Roseanne with her bad knee by getting her an elevator chair, which she refuses to use because she doesn't want to admit getting old, on the second episode of the revival of 'Roseanne,' TUESDAY, APRIL 3 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose via Getty Images) ROSEANNE BARR, JOHN GOODMAN, LAURIE METCALF, EMMA KENNEY, SARA GILBERT ROSEANNE - 'Roseanne Gets the Chair' - Roseanne's clash with Darlene over how she's raising her kids - especially Harris - reaches a breaking point; while Dan tries to help Roseanne with her bad knee by getting her an elevator chair, which she refuses to use because she doesn't want to admit getting old, on the second episode of the revival of 'Roseanne,' TUESDAY, APRIL 3 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose via Getty Images) SARA GILBERT, JOHN GOODMAN, LAURIE METCALF, ROSEANNE BARR ROSEANNE - 'Roseanne Gets the Chair' - Roseanne's clash with Darlene over how she's raising her kids - especially Harris - reaches a breaking point; while Dan tries to help Roseanne with her bad knee by getting her an elevator chair, which she refuses to use because she doesn't want to admit getting old, on the second episode of the revival of 'Roseanne,' TUESDAY, APRIL 3 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose via Getty Images) ROSEANNE BARR ROSEANNE - 'Eggs Over, Not Easy' - A crucial moment for Becky's surrogacy arrangement forces her and Darlene to critically assess each other's lives. Meanwhile, an animal rescue organization rejects Jackie's application to adopt a puppy; and Roseanne makes a plan to change their mind, on the fourth episode of the revival of 'Roseanne,' TUESDAY, APRIL 10 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose/ABC via Getty Images) LAURIE METCALF ROSEANNE - 'Eggs Over, Not Easy' - A crucial moment for Becky's surrogacy arrangement forces her and Darlene to critically assess each other's lives. Meanwhile, an animal rescue organization rejects Jackie's application to adopt a puppy; and Roseanne makes a plan to change their mind, on the fourth episode of the revival of 'Roseanne,' TUESDAY, APRIL 10 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose/ABC via Getty Images) LECY GORANSON, LAURIE METCALF ROSEANNE - Iconic comedy series Roseanne returns to The ABC Television Network on Tuesday, March 27, at 8 p.m. EDT, with nine new episodes featuring the complete original cast - Roseanne Barr, John Goodman, Sara Gilbert, Laurie Metcalf, Michael Fishman and Lecy Goranson. Sarah Chalke, who played the character Becky in later seasons, will also appear in another role. New cast joining the one-of-a-kind Conner family includes Emma Kenney as Harris Conner-Healy, Ames McNamara as Mark Conner-Healy and Jayden Rey as Mary Conner. With fresh stories that tackle todays issues and even more laughs from a brilliant cast and crew that havent missed a beat, audiences old and new will celebrate the homecoming of Americas favorite working-class family. (Adam Rose/ABC via Getty Images) SARA GILBERT, ROSEANNE BARR ROSEANNE - 'Eggs Over, Not Easy' - A crucial moment for Becky's surrogacy arrangement forces her and Darlene to critically assess each other's lives. Meanwhile, an animal rescue organization rejects Jackie's application to adopt a puppy; and Roseanne makes a plan to change their mind, on the fourth episode of the revival of 'Roseanne,' TUESDAY, APRIL 10 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose/ABC via Getty Images) LECY GORANSON ROSEANNE - Iconic comedy series Roseanne returns to The ABC Television Network on Tuesday, March 27, at 8 p.m. EDT, with nine new episodes featuring the complete original cast - Roseanne Barr, John Goodman, Sara Gilbert, Laurie Metcalf, Michael Fishman and Lecy Goranson. Sarah Chalke, who played the character Becky in later seasons, will also appear in another role. New cast joining the one-of-a-kind Conner family includes Emma Kenney as Harris Conner-Healy, Ames McNamara as Mark Conner-Healy and Jayden Rey as Mary Conner. With fresh stories that tackle todays issues and even more laughs from a brilliant cast and crew that havent missed a beat, audiences old and new will celebrate the homecoming of Americas favorite working-class family. (Adam Rose/ABC via Getty Images) ROSEANNE BARR, JOHN GOODMAN ROSEANNE - Iconic comedy series Roseanne returns to The ABC Television Network on Tuesday, March 27, at 8 p.m. EDT, with nine new episodes featuring the complete original cast - Roseanne Barr, John Goodman, Sara Gilbert, Laurie Metcalf, Michael Fishman and Lecy Goranson. Sarah Chalke, who played the character Becky in later seasons, will also appear in another role. New cast joining the one-of-a-kind Conner family includes Emma Kenney as Harris Conner-Healy, Ames McNamara as Mark Conner-Healy and Jayden Rey as Mary Conner. With fresh stories that tackle todays issues and even more laughs from a brilliant cast and crew that havent missed a beat, audiences old and new will celebrate the homecoming of Americas favorite working-class family. (Adam Rose/ABC via Getty Images) ROSEANNE BARR, JOHN GOODMAN ROSEANNE - Iconic comedy series Roseanne returns to The ABC Television Network on Tuesday, March 27, at 8 p.m. EDT, with nine new episodes featuring the complete original cast - Roseanne Barr, John Goodman, Sara Gilbert, Laurie Metcalf, Michael Fishman and Lecy Goranson. Sarah Chalke, who played the character Becky in later seasons, will also appear in another role. New cast joining the one-of-a-kind Conner family includes Emma Kenney as Harris Conner-Healy, Ames McNamara as Mark Conner-Healy and Jayden Rey as Mary Conner. With fresh stories that tackle todays issues and even more laughs from a brilliant cast and crew that havent missed a beat, audiences old and new will celebrate the homecoming of Americas favorite working-class family. (Adam Rose/ABC via Getty Images) SARA GILBERT, LAURIE METCALF, ROSEANNE BARR ROSEANNE - 'No Country for Old Women' - After Beverly gets kicked out of the nursing home, Roseanne and Jackie fight over who will take care of their mother. Meanwhile, Mark's creative touch with building a birdhouse for Dan's customer is more than Dan can handle, but Darlene defends her son, on the sixth episode of the revival of 'Roseanne,' TUESDAY, MAY 1 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Greg Gayne/ABC via Getty Images) JOHN GOODMAN, LAURIE METCALF, ROSEANNE BARR ROSEANNE - 'Darlene v. David' - David unexpectedly shows up for Harris' birthday after being absent for years, forcing Darlene to re-examine their relationship and the rest of the family. Meanwhile, Roseanne and Jackie's mother, Bev, temporarily moves into the Conner home after an incident at the nursing home prevents her from returning, on the fifth episode of the revival of 'Roseanne,' TUESDAY, APRIL 17 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Greg Gayne/ABC via Getty Images) ROSEANNE BARR, ESTELLE PARSONS ROSEANNE - 'Go Cubs' - The Conners can't pay their Wi-Fi bill, so they befriend their new neighbors to use the internet for Mary to Skype with mom Geena, who is stationed in Afghanistan. Meanwhile, Dan loses an important job and D.J. admits post-military life has been hard, so they come up with a plan to make extra money, on the seventh episode of the revival of 'Roseanne,' TUESDAY, MAY 8 (8:00-8:30 p.m. EDT), on The ABC Television Network. (Adam Rose/ABC via Getty Images) ROSEANNE BARR, JOHN GOODMAN Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

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