Multiple firefighters were injured Saturday night in an explosion in downtown Los Angeles.

The city's fire department confirmed the blast occurred at around 6:30 p.m. at 327 E Boyd St. LAFD firefighters responded to a blaze at a one-story commercial building; however, the fire has since spread to multiple buildings. The Los Angeles Times reports it is unclear if there have been any casualties, though the LAFD tweeted approximately 10 firefighters "were down."