Police in Helena-West Helena are investigating after a man in a clown mask robbed a third business in less than two weeks, police said.

Officers responded to an armed robbery at the Southern Bancorp Bank in the 400 block of Plaza Street at 2:19 p.m. Friday.

According to witnesses, the male suspect entered the bank with a black semi-automatic handgun and demanded money from the tellers.

Witnesses said the robber was wearing black pants, a black sweatshirt with a white T-shirt underneath, blue latex gloves, white tennis shoes and an orange and white clown mask.

The robber fled in a white, four-door Ford Taurus, possibly with a Tennessee license plate. He was last seen traveling south on Fourth Street.

Police believe this is the same person who robbed another bank and a post office last week.