NEW : All involved in a mass dinghy capsizing in Northern Ireland have been accounted for . NEW : 10 people needed medical treatment , most for hypothermia , the coast guard says . Twenty people ended up in the water , 10 of whom needed medical attention , with most showing signs of hypothermia , Liam Colquhoun of the Belfast Coastguard said . Belfast coast guard was informed about 6 p.m. , that some of the boats had capsized . East Down Yacht Club at Belfast Lough is hosting the dinghies championships .
NEW : All involved in a mass dinghy capsizing in Northern Ireland have been accounted for . NEW : 10 people needed medical treatment , most for hypothermia , the coast guard says . Belfast coast guard was informed about 6 p.m. , that some of the boats had capsized . East Down Yacht Club at Belfast Lough is hosting the dinghies championships .