Police are looking for a woman who they say punched a 4-year-old boy inside Joyce Kilmer Park.

It happened at around 6:30 a.m. on Aug. 31 near Walton Avenue and East 164th Street.

Sources close to the investigation say the alleged attacker was at the park with her son when he began "playfighting" with the 4-year-old victim, who was also accompanied by his mother.

The woman then walked up to the child and struck him above the eye.

Police say paramedics took the boy to BronxCare Health System. He suffered minor injuries and is expected to recover physically.

According to investigators, the woman took off after the assault. She is approximately in her 30s and was last seen wearing a gray shirt and black pants.

Police urge anyone with information to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477).