Authorities say a 20-year-old man riding a bicycle in a central Indiana town was killed when his bike was hit by a vehicle that then drove away. Hamilton County sheriff's Deputy Bryant Orem says Nicholas Camp of Cicero was pronounced dead at an Indianapolis hospital after he was injured in the crash Monday night. Orem says investigators believe Camp was riding on a street in Cicero when the bike's handlebar was hit by a passing vehicle, causing him to crash. He says a passer-by found Camp, who wasn't wearing a helmet and suffered severe head injuries. The sheriff's department asked for the public's help in finding whoever struck Camp in the town about 20 miles north of Indianapolis.