PHILADELPHIA — State police say a school bus driver and a motorist have been arrested following a case of road rage in which police say the bus driver flashed a gun when the motorist tried to board the bus in Philadelphia.

The Philadelphia Inquirer reports ( ) authorities say the motorist pulled over on Interstate 676 Thursday afternoon to confront the bus driver, who he said was tailgating.

State police say the motorist then tried to board the bus, prompting the bus driver to flash a handgun.

Police say there were no children aboard the bus at the time.

It wasn’t immediately known which school district the driver was contracted with.

State police are reviewing security footage from the bus.

The names of the drivers weren’t released.

Information from: The Philadelphia Inquirer,