Police have issued a community alert after a 38-year-old woman was attacked and nearly sexually assaulted in Humboldt Park Thursday. File photo. View Full Caption DNAinfo/Erica Demarest

CHICAGO — Police have issued a community alert after a 38-year-old woman was attacked and nearly sexually assaulted in Humboldt Park Thursday.

The woman was walking her dog in the 1600 block of North Sawyer Avenue when she noticed a man coming toward the street from an alley, police said.

After the woman passed the mouth of the alley, the man grabbed her from behind by her hair. He held her hair with one hand and partially removed her pants with the other, according to police.

When the woman said she didn't have money, her attacker allegedly replied: "That is not what I want."

The woman eventually broke free and ran home, police said. Her attacker possibly ran west, toward North Kedzie Avenue.

Cops described the attacker as a 6-foot tall man with a dark complexion. He was wearing a black ski mask, black hooded sweatshirt with white strings, black jacket, black gloves, green camouflage pants and dirty white sneakers.

The woman wasn't able to discern her attacker's race or age, but did say he "emitted an unpleasant odor," police said.

Cops ask anyone with information to call detectives at 312-744-8200 and reference case No. HX-125449.