Two additional inmates at a West Virginia prison have come under scrutiny in the investigation into the brutal slaying of James “Whitey’’ Bulger, according to authorities.

Investigators are focusing on the actions of Felix Wilson, 26, a New York man who shared a cell with Bulger in the hours before his death on Oct. 30, just hours after he arrived at the federal prison. The second inmate under scrutiny is Sean McKinnon, 32, a Vermont man serving an eight-year sentence for stealing a dozen guns.

McKinnon shared a cell with Fotios “Freddy’’ Geas, a Mafia hitman from West Springfield who is serving a life sentence for two murders and was previously identified by law enforcement officials as one of two suspects in Bulger’s slaying. The other suspect is Paul J. DeCologero, a member of a North Shore organized crime group that dismembered a teenage girl they feared might cooperate against them.