Hawthorn AFL coach Alastair Clarkson is under investigation for allegedly abusing an official at his son’s under-nines football carnival.

And the Hawks have also confirmed police are investigating an incident in which fringe player Jarrad Boumann injured his hand in an altercation early on Sunday morning after leaving a nightclub.

Clarkson, who was a runner in the junior match on Sunday, has admitted to using expletives to an adult official and apologised.

The South Metro Junior Football League is investigating the incident.

Clarkson says he was attempting to reorganise the players when both teams began to kick to the same end, and repeatedly tried to explain the situation to an off-field league official when he was instructed to leave the ground.

“During the conversation with the league official, I used a couple of expletives and I apologise to the official for the language used,” Clarkson said.

“I was only trying to re-organise the players into their correct positions and certainly didn’t intend for this to become an issue for the official, the league, or the two teams.”

The incident follows Clarkson slamming his hand through a wall in the MCG coaches’ box during his side’s win over Collingwood on Saturday.

The Hawks have also penalised superstar forward Lance Franklin over the speeding incident which cost him his driver’s licence last week.

Franklin must make a $1000 donation to a road safety charity, and organise a presentation from an outside body to all Hawthorn players on responsible conduct on the roads.