A Portland man has been charged with smashing a mug over a police officer's head during the removal of a makeshift campsite from the Cobboboonee National Park.
Detective Sergeant Jason von Tunk, of the Portland police crime investigation unit, said investigators were called to the forest after a confrontation on Tuesday morning.
He said Department of Environment, Land, Water and Planning forest and wildlife officers ran the operation to remove the makeshift campsite in coordination with Portland police.
About a dozen officers were involved.
"The forest and wildlife officers had a court order to close the camp in the Cobboboonee forest and remove all fixtures," he said.
"When the notice was served one of the protestors remonstrated."
Detective Sergeant von Tunk said a 63-year-old Portland man was arrested, interviewed and charged with assaulting a police officer, hindering police and assault with a weapon.
It's alleged the man smashed a mug over a police officer's head.
"The accused man has been charged and released on bail to appear in the Portland magistrates Court on July 2," he said.
The operation to clear the camp started at 9am and finished about 2pm on Tuesday while many of the protestors were in Ararat protesting about roads works on the Western Highway involving sacred trees.
At Cobboboonee three caravans were towed away and a backhoe was used to dismantle and remove four erected structures.
Detective Sergeant von Tunk said he understood there was only a couple of protestors at the camp and after the initial incident there was little resistance.
Mid last week police attended at the camp with a search warrant and located three cannabis plants.
A Portland man in his 40s was charged with possessing, using and cultivating cannabis and introducing a foreign species of plant into a forest.
A fortnight previous two men were charged with similar offences after a dozen cannabis plants were found.
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