Several workers were injured Monday in an explosion on the Colonial Pipeline in Shelby County, Alabama, officials say. The blast on the major pipeline sent flames and smoke shooting into the air.

At least seven people were severely burned in the explosion, Al.com reports.

Firefighters from several departments in the Birmingham area responded to the fire, which had spread across about 10 acres of forest, the news website reports. The explosion occurred about 3 p.m. as eight or nine subcontractors worked on the pipeline, which has been shut down in the area as a result of the blast.

Incredible video of the Colonial Pipeline leak from Ryan Burtis. Our thoughts & prayers to all pic.twitter.com/NUOdoaW7O5 — WBRC FOX6 News (@WBRCnews) October 31, 2016

Lieutenant Russell Bedsole told the Wall Street Journal the workers were doing maintenance on the pipeline, which moves gasoline, diesel and jet fuel from Texas to the Atlantic Coast, when the explosion occurred.

“This appears to be an accident,” Bedsole told the newspaper. “There is no suspicion of terrorist activity.”

The incident is the second accident on the Colonial Pipeline in recent weeks. A leak last month caused a shortage of gasoline, resulting in higher gas prices in the Southeast, according to the Wall Street Journal. A new section of pipe was installed to bypass the leak.

Several videos, which you can watch below, show the aftermath of the explosion:

Colonial Pipeline explosion in Shelby County AlabamaLarge Gas Fire Located 8 miles east of Woodstock, Alabama near River Road – SkyBama.com 2016-10-31T23:33:47.000Z

Gas line fire near Helena, AlabamaFire departments from across the Birmingham area are responding to a report of a gas line explosion in the Helena area, according to social media reports. The explosion was reported to be in the area of River Road and highway 13. Full story: http://www.al.com/news/birmingham/index.ssf/2016/10/reported_gas_line_explosion_se.html#incart_river_index 2016-10-31T20:42:53.000Z

VideoVideo related to colonial pipeline explosion: photos & videos from alabama blast 2016-10-31T20:54:53-04:00

VideoVideo related to colonial pipeline explosion: photos & videos from alabama blast 2016-10-31T20:54:53-04:00

Shelby County Gas Line Explosion Burns At Least 10 AcresCredit: James Boothe/DirtSculpting.com Seven people were injured in a gas line explosion which charred at least 10 acres in Shelby County, Alabama, on Monday, October 31. The incident occurred near 334 Highway 13, according to WIAT reports. According to AL.com, citing Major Ken Burchfield of the Shelby County sheriff office, subcontractors had been working on… 2016-11-01T00:18:20.000Z

Many bystanders and media outlets also posted photos from the scene:

DEVELOPING: Another dramatic view on the ground of the Colonial pipeline explosion in #shelbycounty #Alabama. 7 confirmed injured. pic.twitter.com/gH8ijsQj1Y — Beth Shelburne (@bshelburne) November 1, 2016

Alabama Forestry says 3 separate brush fires burning due to gas line explosion in Shelby County. 8-9 people possibly injured. pic.twitter.com/UmcPOJZBnm — Beth Shelburne (@bshelburne) October 31, 2016

BREAKING: A look at gas explosion in Shelby County from South Shades Crest, from viewer Susan Walker. pic.twitter.com/EygBbrVj0G — Beth Shelburne (@bshelburne) October 31, 2016

View of the Colonial Pipeline smoke from Calera. @WVTM13 pic.twitter.com/rdnFloARrz — Bruce Finklea (@BruceFinklea) October 31, 2016

UPDATE – Colonial Pipeline officials say they're shutting down the mainlines in Shelby County, Alabama | Coverage continues NOW on Channel 2 pic.twitter.com/fIABbGgn7Q — WSB-TV (@wsbtv) October 31, 2016

Smoke from a Colonial Pipeline facility explosion from 4 miles away. pic.twitter.com/OXulAObPmP — Jon Paepcke (@JonWVTM13) October 31, 2016

The Colonial Pipeline Co. issued a statement on its website after the explosion.

“Colonial has shut down its mainlines in Shelby County, Ala., after reports of a fire on its right of way. Colonial personnel and emergency crews are responding,” the Georgia-based company said. “Colonial’s top priorities are the health and safety of the work crew on site and protection of the public.”

Alabama Governor Robert Bentley tweeted about the blast:

My Office is closely monitoring the explosion in Helena, receiving updates from State & local officials. Pray for workers, rescue personnel. — Gov. Robert Bentley (@GovernorBentley) October 31, 2016

The Shelby County Sheriff’s Office said the situation was “contained” by 7:30 p.m.

“Emergency personnel will remain on scene monitoring the area of the explosion. Please avoid the area to continue to allow emergency crews easy access to the site of the explosion,” the sheriff’s office said in a Facebook post. “We will provide updates as they are available. We wish to thank all the first responders who so quickly responded and put themselves in harms way for the citizens they serve.”

In an earlier message, the sheriff’s office said, “The roadways in the area need to remain closed to all but local traffic to allow emergency personnel easy access. Motorists should find alternate routes until further notice.”