Police are investigating an armed robbery that happened at the Sunoco on 7th Avenue in Altoona just before 10 p.m. Tuesday night.

Officers said the suspect entered the store wearing all black clothing with a ski mask covering his face. We’re also told he was armed with a black handgun.

Officials said the suspect demanded money from the cash register and took approximately $600 in cash. Police said he then fled on foot (towards 18th St.) toward the alley directly behind Sunoco.

Anyone with information is asked to please contact the Altoona Police Department, Blair County 911, or send a private message to the Altoona Police Department’s Facebook Page.