VIDEO: An Ontario neighborhood rocked by a deadly, massive explosion involving fireworks remained evacuated Wednesday, with residents reeling from the series of blasts that shattered nearby windows and sent up a huge plume of smoke.
Authorities - including the FBI and ATF - are investigating Tuesday afternoon's explosion of what were believed to be a cache of commercial-grade fireworks in Ontario.
The incident occurred shortly after 12:30 p.m. Tuesday in the 400 block of West Francis Street. About 50 firefighters still worked to douse the flames three hours after the initial blast. Fire crews remained at the scene Wednesday morning.
Videos posted to social media showed flames and a thick plume of smoke rising from the home, and then a long series of fireworks shooting up into the air, sending nearby pedestrians running for cover.