Los Angeles County fire crews were battling a commercial fire after an apparent industrial explosion in Irwindale Monday morning.
The incident was reported around 10:35 a.m. at 1418 E. Arrow Highway, according to the Fire Department.
The initial emergency call went out as a warehouse explosion, officials said.
Heavy smoke was visible from the blaze as Sky5 was overhead. By 11:30 a.m. much of the smoke had dissipated and flames were no longer visible.
No injuries have been reported and there is no threat to the public, officials said.
Arrow Highway is closed between Rivergrade Road and Avenida Barbosa. The 605 Freeway ramps at Arrow Highway are also closed and motorists are being asked to use alternate routes.