A string of shootings in the Bronx has left one person dead and three other people injured.Police say the first shooting occurred around 7 p.m. Tuesday at Dyre Avenue and Conner Street. They say 20-year-old Peter Robertson was found bleeding. He was taken to Jacobi Medical Center, but did not survive.About 20 minutes later, officials say two people were shot at a playground on East 226th Street and White Plains Road. According to police, a 15-year-old boy was shot in the stomach and a 21-year-old woman was shot in the back. The victims were taken to the hospital for treatment.At about 11:30 p.m., police say the last incident took place on 143rd Street. Officials say a livery cab driver was shot in the shoulder during an attempted robbery. The cab driver is expected to be OK, according to officials.