Two people have died following a multi-vehicle crash in Hagerstown. 9-1-1 calls came in Friday morning sending police to the southbound lanes of I-81. Detectives learned an SUV hit the back of a tractor-trailer which caused a chain reaction crash with three additional big rigs and a pickup truck. A man and a woman didn’t survive while three others were hospitalized. Southbound lanes remained closed well into the evening rush.