A man was fatally shot in the head overnight in the Bronx, investigators say.

Police say the 23-year-old man was found dead with a gunshot to the head at around 12:30 a.m. in front of a bodega on East Tremont Avenue.

A person of interest, a 25-year-old man, is in custody. Police say the 25-year-old and the victim had some kind of interaction with the victim before it got deadly, but they didn't know each other.

No charges have been announced yet.