Police: Knife-wielding man tried to rob off-duty officer

CHICAGO, Dec. 20 (UPI) -- Chicago police said they arrested a man accused of trying to rob an off-duty police officer at knifepoint on the street.

Police News Affairs Officer Amina Greer said a 20-year-old man on a bicycle approached the off-duty officer while he was walking around 12:30 a.m. Friday, the Chicago Tribune reported Friday.

The man brandished a knife and announced a robbery, leading the off-duty officer to reveal himself as a police officer.

The off-duty officer took the knife-wielding man into custody "without incident," Greer said.

Officers patrolling the area responded to the off-duty officer's call for backup and took the suspect to the Town Hall District station.