Two large fuel trucks holding approximately 10,000 litres of diesel fuel stolen from a construction site in Moncrieff on Sunday night or Monday morning have been found.
Both trucks were found on Tuesday, one in Casey and the other across the NSW border.
The trucks, a Mercedes and a Hino marked with Hardy Bros signs, are believed to have been stolen between 5.30pm on Saturday and 5.30am on Monday.
The Mercedes AXOR05A model, is mostly white with blue and yellow Hardy Bros signs on both sides, with the NSW registration BT 26 LH.
The Hino truck, a D350D model, is also white with the same signs and NSW registration AU 73 LA.
Police said the trucks service other vehicles and were holding about 10,000 litres of diesel fuel between them.
Police are urging anyone who may have seen the vehicles, or any witnesses to anything suspicious in the area to contact Crime Stoppers on 1800 333 000, or at act.crimestoppers.com.au.