UK: A rescue operation is under way after four men became trapped in a drift mine in the Swansea Valley.

They are stuck in a ventilation shaft at the Gleision Colliery, near Cilybebyll, Pontardawe.

South Wales Police said three other men had earlier escaped from the colliery, one of whom is in hospital.

Police, who called it a difficult rescue operation, said there is a water in the mine.

Emergency services confirmed one person had been taken to Morriston Hospital in Swansea but no details have been released about his condition.