A Warragul petrol station reported three thefts in less than an hour on Friday, August 9.
United service station in Queen St reported thefts at 9pm, 9.09pm and 9.50pm, with police investigating if two thefts are linked.
Police said a woman driving a silver BMW SUV, with registration plates "ABN 334", filled up the vehicle with 20 litres of premium fuel worth $41.
It is reported she entered the store, took five energy drinks and walked out without payment.
The woman was described as in her early 20s and wearing grey clothing and white shoes.
Just nine minutes later, a man driving a silver Nissan utility, with registration plates "1XB 5PV", attended the station.
He allegedly filled up with $77 of diesel and drove off without payment.
In the third incident, police said a woman walked into the store and allegedly placed several items into a backpack.
The attendant locked the door before she could leave.
It is alleged the woman placed some items from the backpack on the counter, opened the door using an emergency button and left without paying for several items still inside the bag.
She was described as being in her early 20s with blonde hair. Wearing grey pants, white shoes and a big grey jacket, police are investigating if it is the same woman from the 9pm theft.
Anyone with information which may assist police investigations is asked to contact Warragul police on 5622 7111.