Search teams hope the equipment, on loan from Indonesia's navy, will help find the overloaded boat which sank on Monday on Lake Toba, a picturesque tourist destination in Sumatra.

Five people were killed when their helicopter crashed in poor conditions in a mountainous part of Wales, rescuers said on Thursday after a major search operation.

The death toll from a boat accident in Bangladesh has risen to 24, with rescuers pulling six more bodies from the river as they wrapped up the search operation on Friday, police said.