Vanessa Marquez, an actress best known for her role as a nurse on “ER,” was shot and killed by South Pasadena police on Thursday, authorities confirmed on Friday.

Officers were called to Marquez’s home in the 1100 block of Fremont Avenue by a landlord to check on her welfare. When the officers arrived around 12 p.m., she was suffering from seizures and appeared unable to take care of herself. Officers called out paramedics and a mental health clinician, and continued to talk with her. After about 90 minutes, Marquez, 49, armed herself with a BB gun and pointed it at the officers, causing them to open fire, said Sheriff’s Lt. Joe Mendoza.

South Pasadena, a municipality separate from neighboring Pasadena, is eight miles northeast of downtown Los Angeles.

Mendoza told reporters that Marquez appeared to be going through “mental problems” and seemed to be “gravely disabled.”

She appeared as Ana Delgado in the Edward James Olmos-starring film “Stand and Deliver” in 1988, and in 27 episodes of “ER” as nurse Wendy Goldman. Her other credits include the series “Malcom & Eddie” and “Wiseguy.”

Last October, Marquez alleged that she was blacklisted from “ER” by co-star George Clooney after complaining of racial discrimination and sexual harassment.

“Clooney helped blacklist me when I spoke up abt harassment on ER.’women who dont play the game lose career’I did,” she wrote on Twitter.

Clooney issued a statement at the time saying he had nothing to do with casting on the show.

“I had no idea Vanessa was blacklisted,” he said. “I take her at her word. I was not a writer or a producer or a director on that show. I had nothing to do with casting. I was an actor and only an actor. If she was told I was involved in any decision about her career then she was lied to. The fact that I couldn’t affect her career is only surpassed by the fact that I wouldn’t.”

Marquez also wrote on social media that she was suffering from immune disorders, including celiac disease. She said several times that she was diagnosed as “terminal,” was suffering from chronic pain, and was “homebound.”

Marquez had alleged she was groped on the set of “ER” well before the #MeToo movement last fall. She claimed that when she complained to the producers, she was exiled.

“I was blacklisted and my career was over at 26,” she wrote on Facebook in January 2017. “Why are women afraid to speak up ‘at the time?’ Because everything they’ve ever worked for is RIPPED away from them. For being a goddamn victim and expecting protection.”

She also wrote extensively about her health problems and said she was entering “that Norma Desmond stage that some actors do. Watching their old stuff on tv.”

“A person only has so much strength and I’m afraid I’ve used all mine up,” she wrote. “Why couldn’t my dream have lasted for more than just those few years?”

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