New Haven police have issued an Amber alert for a 5-year-old boy who was last seen in the company of a 22-year-old man.

Police say Isiah Williams was last seen about 9:30 p.m. Tuesday night at a location on Liberty Street.

Police say the boy may be in imminent danger. He was last seen wearing a white pajama shirt and white underwear with a truck design.

Police say he's in the company of Domingo Acosta, a Hispanic man. They may be in a white Toyota Solara with an unknown license plate number.

Police also say if the boy and the man are spotted, police should be called rather than putting the boy in danger.