FRESNO COUNTY, California (KSEE/KGPE) – The Sky Fire, burning in northern Fresno County, was started by illegal fireworks, according to Cal Fire.

The fire started late Monday. The most recent update places it at 26 acres burned and 40% contained.

In a Twitter post on Tuesday, the state fire agency said that crews were making good progress in containing the wildfire burning on Sky Harbor Road, at El Lado Road.

Crews add that a felony charge will be issued for any person caught recklessly starting a fire.