MONROVIA — Police are seeking the public’s help in tracking down home-invasion robbers who held a woman captive at gunpoint in her her own bedroom while ransacking her house for valuables.

The crime took place about 4:50 p.m. July 15 in the 200 block of East Chestnut Avenue, according to Monrovia police officials and logs.

Investigators Wednesday released a sketch of one of the robbers in hopes of generating clues.

A woman arrived home and went to her upstairs bedroom when she heard noises downstairs, but believed it was her sister who had forgotten her house key and was entering through a window, Monrovia police officials said in a written statement.

“The victim was confronted by a male black suspect in her room and was held at gunpoint,” the statement said. “The suspect demanded money and ordered the victim to lie face down on the floor, and the victim’s head was covered with a shirt to shield her view.”

Though the woman heard the voice of a second robber, she never got a look at him, police added. The gunman sounded as if he was talking on a cell phone, and possibly taking orders regarding where to search while ransacking the home.

The robbers ultimately fled with the woman’s wallet, as well as a cell phone, two laptop computers, a book bag and a PlayStation 3.

Police described the gunman as a black man, 22 to 30 years old, 5 feet 7 inches to 5 feet 10 inches tall, 150 pounds, with black hair and brown eyes. No description of the second robber was available.

Anyone with information on the crime is asked to contact Monrovia police detectives at 626-256-8000.

SKETCH courtesy of the Monrovia Police Department