A Bronx ex-con called his parole office and confessed to fatally stabbing his wife in the stomach, then fled, police sources said Monday.

Someone called 911 at 10:19 a.m. to report a person being assaulted with a knife inside a Tremont building, authorities said. Responding NYPD officers discovered the 53-year-old victim in a seventh-floor apartment at the Southern Boulevard building. She had a stab wound to the stomach.

She was pronounced dead at the scene, police said.

At some point, the victim’s 59-year-old husband — who is on parole — called his parole officer and confessed that he had killed his wife, according to a police source. The suspect remains at large.

The identities of the husband and wife were not immediately released.