Fire officials are investigating a string of fires Thursday night in Antioch as arson.
Just before 10:00 p.m., the fire department received reports of a structure fire, according to Robert Marshall of Contra Costa County Fire Protection District.
While on their way to this fire, firefighters got reports of several more fires all within a few blocks of the same area of A and Midill streets.
There were three homes on fire on Midill St., Marshall said.
Two out buildings were also burning in the same area.