Authorities in New York say a subway passenger assaulted a young boy riding in a train car Saturday afternoon.

According to the New York Daily News, the suspect punched a 5-year-old boy in his face as the victim’s mother stood nearby.

The man then allegedly mocked the boy before running out of the train when it reached the Bergen Street Station station.

Witnesses have provided investigators with information — including a photograph of the suspect — that they hope will help identify and arrest the man responsible.

Police say the incident occurred around 4:25 p.m. Saturday near the Brooklyn neighborhood of Cobble Hill.

As WNBC reported, The suspect struck a blow that landed the young boy at a local medical center with bruising and swelling of his face.

Adding insult to injury, the man allegedly further victimize the boy by teasing him about the injury.

“Are you going to cry to ya’ mommy?” he asked.

The suspect has been described as a black male around 20 years old, 160 pounds with a medium build and standing about 6 feet tall.

He was last seen wearing a long-sleeved shirt with a black jacket, beige pants and black sneakers.

The New York Police Department is asking anyone with information about the man pictured above or the assault of the 5-year-old boy aboard the G train Saturday afternoon to contact Crime Stoppers confidentially by calling 800-577-TIPS.

[Featured image: New York Police Department]