Detectives are investigating the third recent fire at the Wodonga skate park.
The most recent blaze was sparked in a bin about 12.25am on Wednesday, following a similar bin fire 24 hours earlier.
Police believe the incidents may be linked, with all fires occurring about 15 to 20 metres apart.
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Detectives are keen to stop the behaviour, particularly as the weather warms up.
Investigators are keen to speak to people with information on those responsible.
Anyone with information can call (02) 6049 2600 or 1800 333 000.
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