West Rogers Park store robbed at knife-point: police

CHICAGO - Chicago police are investigating an armed robbery at a store on Chicago's North Side Tuesday night. 

A male offender walked into a retail store in the 6100 block of North Western Avenue at 9:25 p.m. armed with a large knife and announced a robbery. 

He fled the store with an unknown amount of cash. No injuries were reported. 

There is no one in custody. Area Three detectives are investigating.