SAN DIEGO (KGTV) -- An explosion in downtown Los Angeles injured nearly a dozen firefighters Saturday night, authorities said.
Crews were battling a commercial fire at 6:26 p.m. inside the Smoke Tokes Warehouse Distributor located at 327 E. Boyd St., according to Los Angeles Fire Department Capt. Erik Scott.
As crews were working to extinguish the flames, there was an explosion inside the building injuring the firefighters.
"An explosion on scene has caused a MAYDAY with approx 10 firefighters down and multiple buildings on fire," fire officials said.
Over 230 firefighters were called to the fire and a medical branch was “created for treating and transporting injured firefighters," LAFD fire officials said.
In total, 11 firefighters were injured as a result of the explosion, Scott said. The condition of the firefighters was not immediately known at this time.
Some of the injured firefighters suffered "obvious damage and burns," Scott said.
Scott described the burning commercial building as being a supplier "for those who make butane honey oil." Honey oil, or cannabis oil, which is sometimes consumed by vaporizing or smoking, involves a dangerous extraction process.
"There was a significant explosion that caused a mayday report," Scott said. He added that the cause of the blaze "is of paramount concern."
A truck parked across the street from the burning building was blackened and firefighting equipment was damaged, according to Scott.
Crews were able to knock down the fire around 8:08 p.m., according to Scott. The cause of the blaze is under investigation.
Los Angeles Mayor Eric Garcetti tweeted about the incident shortly after reports of the explosion.
"My thoughts are with our brave @LAFD firefighters. Closely tracking this situation as we continue to get more information," said Garcetti.
Stay with ABC 10News for updates on this developing story.