Police are warning of three armed carjackings this week that happened in the Portage Park neighborhood on the Northwest Side.

In each instance, the carjacker or a group of carjackers approached the victim, showed a handgun and stole the victim’s vehicle and property, according to Chicago Police.

The carjackings occurred:

about 3:30 p.m. Sunday in the 5600 block of West Byron;

about 2:55 a.m. Monday in the 5100 block of West Warwick; and

about 2:05 p.m. Thursday in the 4300 block of North Lavergne.

Police said victims of the Sunday carjacking reported their car was taken by a man and a woman, while victims of the Monday and Thursday carjackings described a group of three men.

Anyone with information should contact Area North detectives (312) 744-8263.