Concord police are seeking a man who robbed a liquor store at gunpoint Wednesday night, a police corporal said today.The robbery was reported at about 9 p.m. Wednesday at the Los Amigos Market & Liquor, located in the 3600 block of Willow Pass Road, police Cpl. James Carroll said.The man walked into the store armed with a gun and demanded money from the store clerk. He received an undisclosed amount of cash and fled from the area on foot. He was last seen running east on Willow Pass Road, Carroll said.No one was injured during the robbery, he said.The suspect is described as a white man in his 40s who is about 6 feet tall with a stocky build. He was last seen wearing a blue long-sleeved shirt, a dark baseball cap with a white logo, a black bandanna over his face, and dark-colored shoes, according to Carroll.