President Obama has violated US laws when he approved the exchange between US Sergeant Bowe Bergdahl and five senior Taliban fighters held in Guantanamo Bay, two Republicans have claimed.
Howard McKeon, chairman of the House Armed Services Committee, and James Inhofe, senior Republican member of the Senate Armed Services Committee, said Mr Obama "clearly violated laws" requiring him to give 30 days' notification.
But a senior US official said the administration had seized on a chance to save Bergdahl. "The administration determined that given these unique and exigent circumstances, such a transfer should go forward notwithstanding the notice requirement," the official said.
More top news
Ridge of high pressure will settle conditions for many tomorrow, however from the west more rain will arrive and the wind will pick back up
It has caused chaos on the roads and rail network, brought down trees, grounded planes, toppled lorries and also a bus in Cambridgeshire.
The nature of Ian Stewart's killing of his fiancee Helen Bailey and plot to evade detection raised doubts about the death of his wife Diane.