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, near Buffalo, according to New York State Police.

The New York State Thruway Authority reported traffic backed up in the area. WIVB-TV in Buffalo reported several Mercy Flight helicopters were requested, and some uninjured passengers were taken to the Indian Falls Fire Station.

In a statement on Saturday, New York State Police identified the five people who were killed in the crash as Shankar Kumar Jha, 65, of India, Pinki Changrani, 60, of New Jersey, Columbia University student Xie Hongzhuo, 22, of China, Zhang Xiaolan, 55, of New Jersey, and Jian Mingli, 56 of New Jersey.