A man was stabbed to death Monday night in the northeast valley, Las Vegas police said.
Police were called around 6:55 p.m. to the 4000 block of Pistachio Nut Avenue, near Craig Road and Lamb Boulevard, Metropolitan Police Department Lt. Dan McGrath said.
An argument between a couple in the street in front of a home escalated, McGrath said, and a 21-year-old man was stabbed when he tried to intervene.
Medical personnel responded and pronounced the man dead at the scene. McGrath said the stabber, a man in his 50s, is still at large.