An adult man died after being shot Sunday afternoon on Nick Cosmos Way in Holyoke, authorities said. A suspect is in custody as state and local investigators examine the killing. Holyoke police responded to a report of a man down at about 1 p.m. and determined the incident involved a shooting, according to the Hampden District Attorney’s Office. The victim was taken by ambulance to a local hospital, where he later died. Police located and arrested an adult male suspect. Authorities have not announced what charges he may face. He is expected to be arraigned Tuesday in Holyoke District Court. State police detectives assigned to the district attorney’s office are investigating with Holyoke police. Authorities have not released the victim’s identity or provided further details about the circumstances of the shooting.