28 people injured, 1 critically, in Thursday morning tour bus crash on I-490 near Chili

Twenty-eight people were hurt, including one who suffered critical injuries, after a tour bus overturned Thursday morning on Interstate 490.

The crash occurred shortly after 7 a.m., shutting down I-490 between exits 3 and 4 in the Chili/Riga area.

What caused the crash was not immediately clear. Monroe County Sheriff and State Police are investigating. The crash occurred near Union Street.

Westbound lanes in that area are closed, but eastbound lanes are open, according to state Department of Transportation officials.

Several ambulances and other first responders responded to the scene, but there aren't specific details yet on the severity of injuries, or how many people were on board the bus. The bus driver is among the injured.

Rochester Regional Health, which is treating some of the hurt passengers at Rochester General and Unity hospitals, said in a statement that this type of mass casualty is "a scenario we regularly train for and we are coordinating closely with local EMS and law enforcement to ensure a swift and organized response." Patients also were sent to Strong Memorial and Highland hospitals, officials said.

During a media briefing Thursday morning, authorities said the bus — operated by Tribal Sun Bus Co. in Massachusetts — had left from New York City at midnight and was making stops along the Thruway on its way to Niagara Falls.

"At this point, we find no criminality, yet," said Monroe County Sheriff's Chief Deputy Michael Fowler. "We're going to do a thorough investigation, and that is a lengthy process. There is no initial indication of drugs or alcohol being involved, so we will continue to just work with the driver and try to reconstruct the events. ... At this point, we cannot give you a cause, as to why. We still have a lot of work to do with that."

In a statement, Gov. Kathy Hochul expressed her concern for those who were injured and said she was "deeply grateful for the heroic efforts of our first responders."

"I join the people of New York in praying for the well-being of all involved in this serious incident," she said.

People concerned about friends and family that might have been on the bus can reach the family liaison office at (585) 753-4455.