The incident happened yesterday when the bus was standing behind the car at the Jaitpur crossing traffic signal, they said, adding when the signal turned green, the car didn't moved.
As a result, the driver blew horn asking the car driver to move ahead, but angry over honking the five youth got down from the car and beat the bus driver, police said.
After which they managed to escape from the spot, after which the driver registered an FIR against the youths.