A man was arrested Monday on suspicion of fatally stabbing a woman in South San Jose, police said.

Officers responded at about 12:44 a.m. to a home along the 5800 block of Snell Avenue to check on a person who reportedly was assaulted, according to police. The officers found a woman suffering from at least one stab wound.

Medical personnel tried to save the woman, but she died at the scene, police said. Her identity wasn’t immediately known.

A man who knew the woman was taken into custody at the scene. Police said he will be identified at a later date.

A motive for the stabbing wasn’t immediately known. An investigation is underway.

The stabbing is being investigated as San Jose’s 12th homicide of 2026, police said.

Anyone with information about the case is encouraged to contact San Jose police Detective Sgt. Varela or Detective Montoya by email at 3638@sanjoseca.gov and/or 3644@sanjoseca.gov or by phone at 408-277-5283.