DULUTH, MN (KDAL) - Duluth Police are investigating two robberies that occurred within minutes of each other on Thursday night. The first was at 12th Avenue East and 1st Street around 10:58 p-m when the male victim was approached by two black males and a female. One of the males punched the victim and took his glasses, cell phone and wallet. The victim was taken to the hospital with non life threatening injuries. Officers were then called to a robbery at 12th Avenue East and 2nd Street about 5 minutes later. The male victim in this case was approached by two black males asking for a cigarette. When the victim responded that he didn't smoke, the suspects began punching him and stole his laptop, wallet and cell phone. Police have increased patrols in the area where the robberies occurred and are following up on several leads.