Four men are behind bars and a fifth is on the run after an ongoing investigation into a series of armed robberies at a north Shreveport ATM.

Shreveport police say a woman and a man were both robbed at the ATM in the 1600 block of North Market Street. The robbers demanded the woman's PIN number and the man was robbed of an unknown amount of cash and his cell phone. He was also struck in the head with a handgun and suffered minor injuries.

Authorities have gathered information that led them to five potential suspects. Four of them are in jail for the ATM robberies. Police are still looking for the fifth, who's identified as 20-year-old Demarsay Washintgon of Shreveport. He's wanted on a warrant for armed robbery.

Police are asking anyone with information on Washington's whereabouts to call Shreveport-Caddo Crime Stoppers at (318) 673-7373.