By CBS 2 Chicago Staff

CHICAGO (CBS)– A string of robberies on CTA trains and platforms has prompted a police alert.

Police said the offenders walk up to the victims, pull out a gun and take their property.

READ MORE: Former Chicago Bear Dan Hampton Faces Driving While Intoxicated Charge After Recent In Northwest Indiana

Two robberies were reported at the Halsted Green Line station, hours apart on Oct. 24.

READ MORE: Chicago Weather: Slight Warm Up On The Way

The other two incidents were reported at the 69th Street Red Line station on Nov. 5 and 8.

MORE NEWS: Police: CTA Bus Driver Stabbed In Hand After Confronting Man Who Pickpocketed Woman In Old Town


CBS 2 Chicago Staff