A man knifed his brother to death and then hung himself inside their Upper West Side apartment, police sources said Tuesday.

The unidentified 60-year-old suspect killed his 65-year-old brother inside their shared apartment in the Douglas Houses on West 104th Street near Amsterdam Avenue, the sources said.

The 60-year-old hung himself in the apartment after the killing.

The bodies were discovered when the victim’s daughter called police on Monday and said she hadn’t heard from her father, authorities said.

The two brothers have a history of domestic disputes, a source said. It was not clear what touched off the fatal stabbing.