Three men robbed a 12-year-old at gunpoint while the child walked with his mother and 4-year-old sister in Brooklyn, police said.

The suspects (two pictured here) pressed a gun to the back of the adolescent boy and demanded his money on East 18th Street, near Cortelyou Road, in Prospect Park South, around 8:30 p.m., Friday, police said.

The victim’s mother, who was pushing the tot in a stroller, handed over cash and the trio fled, according to cops. No injuries were reported.

All three suspects are believed to be in their 20s. One had a ponytail.