CHICAGO (CBS) — Police on Monday were advising the public to watch for a dangerous duo who attacked a man on a Chicago Transit Authority bus.

The attack happened at 3:30 p.m. Saturday, Jan. 18, on a No. 29 State Street bus at Roosevelt Road.

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The assailants attacked the man with pepper spray, spat on him, and stole his backpack, police said.

One of the suspects is described as an African-American female wearing a black jacket with a gray hoodie, black pants, white shoes, and a pink headband. The other is described as an African-American female wearing a black jacket, blue jeans, black shoes, and a beige-colored plaid headband.

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State Street Bus Robbery Suspects

Surveillance images of two young women who police say robbed a man on a State Street bus. (Credit: Chicago Police)

Police reminded the public to be aware of surroundings, call 911 immediately to report suspicious activity, never pursue a fleeing assistant, and provide information to the police.

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Anyone with information about this attack is asked call Area Central detectives at (312) 747-8380.