Credit: Montgomery County police

Montgomery County police are investigating a report that someone sexually assaulted a girl in the Shady Grove area of Rockville Oct. 31.

The girl told police that she was walking between apartments in the 9700 block of Key West Avenue around 5:30 p.m. when someone sexually assaulted her.

According to police, the attacker appeared to be a male wearing a black brimless cap, a black-and-gray hooded sweatshirt, dark pants and dark shoes.

Police announced the reported assault in a press release Friday and released a sketch of the attacker.

Police ask that anyone with information call them at 240-773-5400 or Crime Solvers at 866-411-8477 for a reward of up to $10,000.

Dan Schere can be reached at