Deputies need help finding a man who sexually assaulted a juvenile in Montgomery County.

Montgomery County sheriff's deputies said a man armed with a gun approached a juvenile in the back yard of a home in the High Meadow Ranch subdivision on Sunday.

The man grabbed the child by the arm to keep the child from running away, investigators said.

Detectives said the man sexually assaulted the child and then ran into a nearby wooded area.

The man was described as white with a possible sunburn and blue eyes and black eyebrows. He was last seen wearing black pants, a black hooded jacket and black shoes.

Anyone with information is asked to call Montgomery County Crime Stoppers at 800-392-STOP.