Someone's on the hook for major repairs after a fish truck burst into flames on the Trans-Canada Highway.

It happened on the weekend about five kilometres east of Chaplin, Sask.

Notanee Bourassa was driving by on Saturday when he saw the scorched vehicle, which had been hauling a load of trout, on the eastbound side of the Trans-Canada.

Bourassa said it looked like the truck had been hit by lightning.

However, the RCMP said it's believed the actual cause was a mechanical problem where the rear brakes overheated. 

No one was injured.