Brazen thieves are siphoning fuel from cars parking near shopping hubs and on Mornington Peninsula roads.

At least three incidents over the past month have been flagged on social media with one woman saying her sister was hit on Monday while shopping at Mount Martha village.

“We were parked behind the shops … and when returning to the car the petrol cap was open and my sister’s petrol had been siphoned from her car,” she posted.

“Couldn’t believe it.”

The post prompted another resident to reveal that petrol had been siphoned from their car and another vehicle while both were parked outside a friend’s house near Racecourse Road in Mornington.

“Unfortunately as prices continue to rise and people end up getting closer to homelessness people will take up options like this,” the resident posted.

“We are thinking of buying key lock petrol cover caps to deal with it.”

Oscar Corden from Supercheap Auto in Mornington said lockable caps cost $30-$40 and were popular with tradies.

“A lot of ute don’t have lockable petrol caps so people buy one of these for some extra security,” he said.

“It’s certainly a lot cheaper than losing a tank of fuel!”

Mr Corden said there hadn’t been a significant increase in sales of lockable fuel caps since petrol prices started increasing.

The victims did not report the theft to police.

According to Mornington police the act would be regarded as a “theft from car” offence.

However, no offences of that kind had been recently reported and there were no active investigations into petrol theft, police said.

The cheapest fuel in Mornington on Wednesday was being sold by Ampol on Moorooduc Highway for $2.09 a litre.

Other Mornington service stations were charging up to $2.14.9 a litre.

Extracted in full from:Petrol prices: Thieves siphon fuel from cars in Mornington, Mt Martha | Herald Sun