A man is dead after being stabbed on the D train overnight in Brooklyn, police say.

Police have identified the victim as 18-year-old Isiah Collazo, a Staten Island resident. 

According to the authorities, Collazo was on the D train as it entered the 4th Avenue and Pacific Street station when he and another man got into an argument that turned deadly. The unidentified male stabbed Collazo with an object and ran off at around 11:30 p.m.

Officers have not recovered a weapon and no arrests have been made. The suspect is still at large.