A fire which burnt through 35 hectares of bushland near Lake Mulwala at the weekend was deliberately lit, police believe.
Firefighters were called to the blaze on an island near Bundalong about 2.20pm on Saturday.
The fire had started on one island on the Victorian side of the border.
Flames spotted onto another island and set alight trees on the lake as the incident quickly escalated.
South westerly winds, gusting up to 70km/h, spread embers and burnt leaves onto a farming property on Spring Drive, near the intersection of Drain Lane.
Two waterbombing aircraft were dispatched to the scene, with images showing a large plume of grey smoke being emitted from the area.
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It took fire crews about three hours to contain the main fire front.
Ground crews were able to access the islands by boat, with emergency service workers from the Corowa Rescue Squad, Rural Fire Service, Country Fire Authority, and the Department of Environment, Land, Water and Planning involved in the incident.
Police revealed on Sunday the fire was likely deliberately lit.
They are trying to track down the occupants of a small fishing boat seen where the fire started.
"The fire spread to 35 hectares of bushland before it was contained about 5.30pm," a spokesman said.
"No persons or livestock were injured, and no property was damaged.
"Officers from Murray River Police District were notified and commenced an investigation.
"Initial inquiries suggest the fire may have been deliberately lit.
"Any witnesses or anyone who saw a small fishing boat in the area at the time is urged to come forward."
An RFS spokesman said the use of waterbombing helicopters had "helped prevent a very serious situation".
While the fire occurred in relatively cool conditions, with a temperature of 25.5 degrees recorded in nearby Yarrawonga when the blaze started, consistently strong winds helped to fan the flames and were of particular concern to the fire crews.
Dozens of firefighters were involved in the incident, including those who had travelled from as far as Savernake and Barooga to attend.
Anyone who witnessed suspicious activity in the area is urged to call Albury police on (02) 6023 9299, or Crime Stoppers on 1800 333 000.