A tour bus returning from a trip to Niagara Falls overturned in upstate New York on Friday, killing five people and injuring dozens of others, some of whom became trapped or ejected, police said.The deadly crash occurred on Interstate 90 in Pembroke,

Both the east and westbound lanes on the I-90 between Exit 48A and 49 have been reopened, according to the New York State Thruway Authority.

New York State Police Troop T Major Andre Ray confirmed the deaths during a press conference near the crash site Friday evening. According to a news release from state police, 52 people, including the driver, were on board the bus at the time of the incident. Here's what we know so far.