Dareton Police are appealing to the public for possible owners, after a number of items were left in the Murray river.
A weighted bag was discovered at Euston, containing two silver six shot revolvers in hard cases.
The bag also held a rose gold coloured laptop and a Samsung tablet.
Police are now searching for the owner; appealing for details on both sides of the border.
Locals with details on stolen items or has any information on the owners are being urged to come forward and contact Crime Stoppers on 1800 333 000.
You can remain anonymous.