UPDATE: Night Fire on Mountainside South of Banning Grows to 50 Acres

Update 9:45 p.m. A fire near Old Banning Idyllwild Road and Shirleon Drive south of Banning had grown to an estimated 50 acres as of 9:30 p.m., according to Cal Fire.

The fire was reported at 6:10 p.m. Saturday Sept. 29 at approximately six acres with no structures threatened, Melody Hendrickson of Cal Fire-Riverside County said in a statement.

By 9:30 p.m. there were more than 230 personnel assigned, from agencies including Cal Fire-San Bernardino, the Bureau of Land Mangement, Morongo Fire, Murrieta Fire Protection District, Pechanga Fire, Riverside City Fire, and the Forest Service, Hendrickson said.

The cause of the fire was said to be under investigation.

Posted 8:35 p.m. A wildland fire in Banning Saturday night quickly scorched six acres but no injuries were reported or buildings threatened, Cal Fire officials said.

The fire -- burning uphill in rugged steep terrain -- was reported shortly after 6 p.m. on Old Banning Idyllwild Road, near Shirleon Drive.

Some 234 firefighters were on scene at the blaze, Cal Fire officials reported.

Keep checking in with Patch for updates.