CONCOURSE, the Bronx — A woman beat a commuter on a northbound No. 4 train in the Bronx, police said Sunday.

The attacker pushed the 27-year-old victim to the floor and then punched and kicked her in the face near the 161st Street station, officials said.

No arrests have been made in the July 18 attack.

Police released a photo of the alleged attacker. They’ve asked for help identifying her. She’s believe to be in her 30s. The woman was last seen wearing a black t-shirt and black sweatpants. She has a tattoo with words only on her arm.

Submit tips to police by calling Crime Stoppers at 1-800-577-TIPS (8477), visiting http://www.nypdcrimestoppers.com, or texting 274637 (CRIMES) then entering TIP577. Spanish-speaking callers are asked to dial 1-888-57-PISTA (74782).