UPDATE: THE death toll in the Queensland floods has risen to six with the discovery of a second body in the Lockyer Valley.

The body of a 34-year-old man was found in a car submerged in the flooded Sandy Creek at Glen Cairn, near Gatton, this morning.

The body of a 25-year-old man was found nearby by police divers several hours later.

The cars were swept off the road by floodwaters as the men drove in convoy from Gatton to Mulgowie to start work at a farm at 5am on Sunday.

Both cars have been extracted from the Sandy Creek, one on Tuesday and the other today.

Four other people have died in flooding caused by ex-cyclone Oswald.

A three-year-old boy died after a tree fall on him in Brisbane, and three men died in floodwaters - one south of Brisbane, one at Burnett Heads near Bundaberg, and the other near Gympie.