Men are robbing people of their cellphones at gunpoint in West Town and Logan Square, according to police. View Full Caption Flickr/vpickering

CHICAGO — Police are warning residents of men stealing cellphones at gunpoint in West Town and Logan Square.

During the robberies, one to four men get out of a small red or dark-colored sedan, brandish guns and demand cellphones and the passwords for the phones from their victim, according to a Chicago Police community alert.

During a July 17 robbery, the thieves came up to a man from behind and punched him without warning, then robbed him, according to police. The men did not have a gun during this robbery, according to police.

The incidents occurred:

• 2:20 a.m. July 17 in the 1600 block of North Wood Street in Bucktown

• 1:20 a.m. Aug. 2 in the 3100 block of West Belden Avenue in Logan Square

• 10:50 p.m. June 26 in the 1600 block of North Mozart Street in Logan Square

The thieves are described as young black men of average build, according to police.

Anyone with information about the robberies is asked to call police at 312-744-8263.

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