BALDWIN PARK (CBSLA.com) — Investigators are trying to determine what led to the fatal stabbing of a man Thursday evening in Baldwin Park.

The unidentified man was found at a home in the 4700 block of Main Avenue, the Baldwin Park Police Department said.

The man’s 18-year-old girlfriend was found several houses away suffering from unspecified injuries. She was taken to a hospital.

Neighbors told CBS2/KCAL9’s Stacey Butler that the couple had been fighting at the time of the attack.

Police would not discuss how the stabbing occurred.

No arrests have been made.