A British teacher is feared drowned after he waded into shark-infested waters off South Africa to save struggling pupils.
Sean Foxcroft, 24, a trained lifeguard, was supervising a group of 15 teenagers as they played rugby on the beach.
But some of youngsters, aged between 16 and 18, went into the surf to cool off and they were dragged out of their depth by strong undercurrents.
Sean and another leader of the group rushed to help. But Sean, of Manchester was bowled over by a wave and swept out to sea. The pupils and the other group leader were unharmed.
A sea and air search was launched around the Indian ocean resort of St Lucia near Durban but by yesterday there was still no trace of Sean and he was presumed drowned.
The Foreign Office said it had contacted his family.
A spokeswoman said: "South African rescue services searched the area until dark yesterday and continue to search."
South Africa's National Sea Rescue Institute said: "Shore patrols conducted during the night have revealed no signs of the missing man, who is presumed to have drowned."
The expedition was run by World Challenge, a firm that organises adventure holidays for school groups. The pupils and four teachers had spent almost a month trekking and were on the "rest and relaxation" phase of their trip.
The company said in a statement: "Two expedition leaders went to provide assistance but although the team members made it back to the shore safely, one expedition leader was overwhelmed by the conditions and was carried out to sea." The group was due to return home tomorrow.
A maths teacher has died of a suspected heart attack on a school trip to Africa. James Rosser, 39, from the Ashcombe School in Dorking, Surrey, died in hospital in Rwanda after collapsing in front of pupils.