Gardai are investigating a road-rage incident in which a school bus driver was left with a broken nose.
The incident unfolded at the North Circular Road in Dublin at around 2.40pm on Wednesday when a Mini car cut in front of the grey minibus, which was being driven by the 32-year-old victim.
This action forced the minibus driver to brake suddenly and it is understood that he may have beeped his horn and this agitated the motorist who jumped out of his car.
Sources say that the car driver then entered the minibus by pushing the emergency exit button and proceeded to attack the driver from Drogheda.
The bus driver was punched a number of times in the face and suffered a broken nose in the assault which he later required hospital treatment for.
Officers from Mountjoy Garda Station are investigating the incident but have not yet arrested the motorist, despite having the car reg of the Mini in which he was driving.
There were no children on board the bus when the violent incident happened. Sources say that gardai are treating the assault as a "road-rage incident".
Incidents of assaults resulting from so-called road rage are relatively rare in Ireland compared to some other countries.
However gardai have had to deal with a number of serious incidents including one in which a Zimbabwe native was jailed for two years last February after he dropped his child to fight a taxi driver in Ballymun in November 2011.
The two men began fighting and the defendant picked up his bike lock and chain and swung it at his victim's head and fractured his skull.
In the most serious road-rage incident here, a now 34-year-old west Dublin man was jailed for 10 years for manslaughter after fatally beating a 49-year-old English man with a hurley in a road-rage attack in south Dublin in September 2010.
In January 2012, a cyclist was awarded €15,000 after his thumb was almost broken by a road-rage bus driver at at Bachelor's Walk, Dublin.