Body of missing Queensland girl found

Emergency crews have found the body of a four-year-old girl who was swept away after a water bladder atop a dam wall burst in central Queensland.

The Blackwater girl was swept down the MacKenzie River when the bladder, holding at least 6000 megalitres of water, ruptured at the Bedford Weir near Blackwater, about 200km west of Rockhampton, at about 4.30pm (6.30pm NZT) on Sunday, police said.

Search crews located the girl's body around 6.20am on Monday, approximately 800m down stream from the weir.

It is believed the girl had been visiting the weir with her mother and two adult friends, a man and woman, when all four were swept away by the influx of water, police said.

A State Emergency Service (SES) flood boat rescued the three adults on Sunday night, with one of the women found clinging to a tree.