The deadly crash occurred on Interstate 90 on Friday in Pembroke, near Buffalo, according to New York State Police.

"Avoid the NYS Thruway eastbound at all costs as a tour bus has rolled over near the Erie and Genesee County lines," Erie County executive Mark Poloncarz said on X. "This is a potential mass casualty incident," he said, adding that the county's emergency and security services are assisting.

A tour bus returning from Niagara Falls Friday afternoon crashed near Buffalo on Interstate 90, killing five adults and injuring dozens.