All mandatory evacuation orders have been lifted in the Kenneth Fire which burned through 1,000 acres in the West Hills area amid several other wildfires in other parts of Los Angeles County.

On Thursday night, the Kenneth fire was being investigated as a possible arson, and a person of interest was detained, officials said. The fire grew quickly to engulf 960 acres near Victory Boulevard west of Gilmore Street and was headed south towards Hidden Hills, fire officials said early Thursday evening.

A fast-moving wildfire has burned nearly 800 acres near West Hills, northwest of Los Angeles, since breaking out earlier Thursday afternoon.