This alert gives notice to recent strong arm robberies of convenience stores that have occurred within the boundaries of the 14th, 18th and 19th District. In these incidents, two of the offenders approached the clerk in the convenience store, grabbed him, and forced him to open the cash register. The third offender entered the store and stayed guarding the front entrance. The offenders then took an unknown amount of US currency from the cash register and other merchandise before fleeing the scene.