A man suspected in several north side robberies struck again tonight.

Around 7 p.m., Chicago police say the armed robber walked into the “Convenient” convenience store in the 3700 block of N. Harlem Drive and took an undisclosed amount of money.

He is believed to be the same robber who held up a 7-11 store in the 2700 block of N. Harlem Dr. twice in the last month. In each holdup, the robber walked in, pulled out a gun, and demanded cash.

Police say the robber has worn a blue hooded sweatshirt with a red Spider-Man ski mask in each robbery.

The robber is described as a white man in his 20′s, standing between 5-foot-8 an 5-foot-11 inches tall. If you know anything you’re asked to call police.