Two women were stabbed, including one fatally, when a domestic incident turned deadly inside a Bronx apartment Sunday morning, police and law enforcement sources said.

The knifing happened around 7 a.m. during an argument between one of the victims and her ex-boyfriend inside a building at Park Avenue and 161st Street, less than a mile from Yankee Stadium, sources said.

The victims — who are believed to be sisters, according to sources — each suffered multiple stab wounds and were rushed to Lincoln Hospital.

The older woman, identified as 57-year-old Rosemary Tapia-Bautista, died at the hospital while the surviving victim, 40, was in stable condition, police said.

Surveillance images show one of the victims being wheeled out of the apartment building and into a waiting ambulance.  

No arrest has been made after the suspect fled on foot, but authorities are looking for the former beau, sources said.