Brookfield police are still searching for a gunman who robbed a south side sandwich shop on June 27, making off with an undisclosed amount of cash.

Police received a 911 call at about 10 p.m. from a witness who said he was outside Mr. Submarine, 9016 47th St., and could see the robbery taking place. While police were en route, the witness told police that the suspect ran west across Plainfield Road and into the truck parking lot.

The suspect is described as a light-skinned black male, about 5-foot-11 with a thin build. He had a black mask or scarf over his face and was wearing a slightly soiled white hooded sweatshirt with the hood up, baggy beige cargo pants and black gloves. He was reportedly armed with a black handgun, which he held in his left hand.

Despite establishing a perimeter and calling in a K-9 unit to help with the search, police were unable to find a suspect. Officers briefly detained a man they saw running in the vicinity of Blanchan Avenue and 47th Street, but he was not involved in the robbery, police said.

A 27-year-old employee of the store told police that the offender entered the area behind the front counter and demanded money. Initially two employees in the store were ordered to sit on the floor, but one got up to open the two cash registers when the offender again demanded money.

After taking money from the drawers, the offender reportedly forced the two employees to the rear office at gunpoint and told them to get on the ground. The offender then ran out of the door and westbound across Plainfield Road.