A man forced two females to perform sexual acts at gunpoint in the Avalon Park neighborhood on the South Side early Sunday.

The two were walking in the 8400 block of South Stony Island about 3:40 a.m. Sunday when a man walked up and began talking to them, according to a community alert from police. The two began to walk away to their vehicle, but the man followed.

After they got into their vehicle, the man pulled a gun on them and made them drive to “an unspecified location where he then forced them to perform sexual acts,” police said.

The suspect was described as a black man between 23 and 25 years old who stands about 5-foot-5 and weighs between 150 and 170 pounds, police said.