A Greyhound bus driving through southwest Ohio crashed on Interstate 75 Saturday, resulting in six passengers, including the driver, sustaining serious injuries.

51 passengers were aboard the bus bound for Detroit when it dropped off the side of I-75 and tumbled into a cornfield, flipping onto its side. At least 34 were injured, the Cincinnati Enquirer reported. The highway's northbound lanes were closed for a few hours after the crash, which occurred just after 4 a.m.

A couple dozen of the riders who were hurt in the crash were rushed to six hospitals from Middletown to Cincinnati. None of the injuries any of the passengers sustained were life-threatening - a lucky thing, too, according to Liberty Township Fire Chief Paul Stumpf.

"We are very lucky," Stumpf told the Enquirer. "The injuries are not as serious as they could have been."

The overturned bus left the driver and one passenger trapped underneath, until rescue crews pried them free.

Medical helicopters flew six seriously injured passengers to hospitals nearby. According to the Enquirer, Greyhound sent out word to pick up any passengers in the crash who were not hurt and still wanted to make it to Detroit.

The cause of the crash is still unknown-officials maintained that there was no glitch with the carrier, and the driver was well-known and reliable.

Kim Plaskett, a spokesperson for Greyhound, said that driver Dwayne Garrett, 64, drove buses for the company for 15 years and only had been driving for an hour before the crash occurred.

"The driver was fully rested," Plaskett said. She also stated that the bus had gone through a yearly in-depth inspection just weeks prior, and that "there were no issues with the bus."

Since 2011, 102 Greyhound bus crashes have been reported.