BALTIMORE (WJZ) — A bus driver was swerving to avoid a collision Sunday morning when the bus rolled over on Interstate 95 in Baltimore County, authorities said.

The crash happened shortly before 7 a.m. Sunday in the southbound lanes of I-95 near Kingsville, according to preliminary details from the Maryland State Police.

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Based on their initial investigation, troopers determined that the bus was in the right lane when the driver swerved to avoid hitting another vehicle.

The driver lost control of the bus, which veered off the road before it rolled over on its side, injuring 27 of the 47 people on board, troopers said.

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Fifteen of those injured were taken to local hospitals for treatment of their injuries, and another 12 refused treatment at the scene of the crash.

While the crash remains under investigation, authorities have ruled out impaired and distracted driving as factors that contributed to the wreck.

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CBS Baltimore Staff