Four dead in Llanidloes reservoir car plunge
An investigation is under way after four people on a family holiday died when their car plunged into a reservoir in mid Wales.
Police said two vehicles had been in collision on the B4518 at the Llyn Clywedog reservoir near Llanidloes, Powys, and one had entered the water.
The female driver survived but the other occupants, reported to have been her husband and three children, died.
A local man was arrested on suspicion of causing death by dangerous driving.
Police said the occupants of the car that went into the water were believed to be from Pontypridd, Rhondda Cynon Taf.
Dyfed-Powys Police said a Peugeot 807 and a Ford Mondeo were involved in a collision at around 1430 BST at the Bwlch y Gle Dam after which the Peugeot left the road and entered the water at the dam.
Police said in a statement on Wednesday: "We can confirm that the woman holidaymaker driving the Peugeot managed to escape from the car and is now receiving medical attention, but tragically four other occupants of that car have been killed.
"A local man was arrested at the scene on suspicion of causing death by dangerous driving, and is in custody at present."
One woman working in a car showroom nearby said she was told that one car had clipped another, and one of them had gone into the water.
"We saw lots of police cars going past, ambulances and two recovery boats," said the woman, who did not want to be named.
Mid and West Wales Fire and Rescue Service said two fire crews and two boats had been involved in the operation.
Two fire engines, one from Llanidloes and one from Newtown, and rescue boats from Aberystwyth and Llanidloes headed to the scene.
RAF Valley, based at Anglesey, sent a Sea King helicopter search and rescue crew.
Anyone who witnessed the incident or was travelling along the stretch of road at around the time of the crash is asked to contact Dyfed-Powys Police on 101.