A clerk at the 7-Eleven convenience store, 6375 N. Milwaukee Ave., reported that armed men robbed the store at about 4:10 a.m. Monday, Dec. 22, according to 16th (Jefferson Park) District police.
The worker reported that three masked men entered the store and two of them displayed pistols, demanding that the cash register be opened, according to police.
The clerk added that one of the men then jumped over the counter and struck him in the head with his pistol, police said…