CHICAGO — Police say robbers have targeted women in a series of recent attacks in Logan Square and Avondale.

In the robberies, one or two men approach women who are alone from behind, knock them down and take their property, police said in a community alert.

In one instance, one of the men asked to use a victim's cellphone before robbing her.

The robberies have occurred in the:

• 3000 block of North Gresham Avenue on Nov. 1 at 1 p.m.

• 3300 block of West Belmont Avenue on Nov. 2 at 8 p.m.

• 3400 block of West Diversey Avenue on Nov. 13 at 9:45 a.m.

Police described one of the suspects as a black man, 20 to 25 years old, standing 6-foot-1, weighing 155 pounds, with long black dreadlocks, wearing all black clothing. Another suspect is described as a black man, 20 to 25 years old, 5-foo-6 to 5-foot-8, weighing 160 pounds. He wore a red puffy vest with a long-sleeved grey shirt.

The suspects in the attack on Diversey are described as black males, 15 to 19 years old, weighing 150 pounds. One wore a black hooded sweatshirt, and the other wore a black-and-red hooded sweatshirt, police said.

Anyone with information should call Area North detectives at 312-744-8263.

For more neighborhood news, listen to DNAinfo Radio here: