Heartland fire apartments
An investigator at the scene of Friday’s explosions in El Cajon. Photo credit: OnScene.TV

The San Diego County Sheriff’s Bomb and Arson Team is investigating the cause of two explosions that destroyed an El Cajon apartment Friday.

Neighbors told OnScene.TV that the first explosion, at around 8 a.m., rocked and lifted the floor of their upstairs apartment, in the 1500 block of Main Street. When they came outside, they witnessed the next explosion blow out the windows of a first-floor apartment.

They also said they could smell a chemical scent coming from the apartment.

Heartland fire crews responded to deal with the heavy fire and smoke coming from the unit.

The resident was not inside at the time, but after firefighters extinguished the blaze, investigators questioned the individual.

There were no reported injuries, but the blast also damaged the surrounding apartments.