Detectives from the Metropolitan Police Department's gang unit are working with homicide detectives after a man was shot and killed Sunday night in central Las Vegas. Two shootings occurred only a block from each other. The first shooting took place around 8:40 p.m. on Van Patten Street and might have involved narcotics, police said. The man shot was taken to the hospital, where he died in surgery. Two hours later, while investigating the first shooting, police heard gunfire and found another man wounded on the 2500 block of Sherwood Street. He is expected to survive. Police say the shootings appear to be related. The suspect or suspects remain on the loose.