A man and his grandson have died in a family fishing accident off the north Wales coast.
The 11ft boat is thought to have been hit by a wave
William James Tinsley, 64, and eight-year-old Ben Tinsley, died despite efforts to save them.
Ben's father Ian, and brother Sean, 11, survived. All were from Buckley,near Mold, north Wales.
The family's 14ft boat was hit by a wave and overturned three-and-a-half miles from Puffin Island, off the coast of Anglesey.
Ian Tinsley and Sean were rescued by the crew of another vessel. Coastguards said all four members of the family had been wearing lifejackets.
It is thought they may have been in the sea for up to three hours and were suffering from the effects of hypothermia.
A police spokesman said it was believed the family had been sailing from Conway Marina to Redwharf Bay when the accident happened.
"It appears that a big wave has just swept over it," he said. "The vessel filled up with water and turned over."
The alert was raised by the crew of the Star Reader who came across the capsized dinghy shortly after 1600 BST on Saturday.
A rescue helicopter from RAF Valley on Anglesey was scrambled and a crew member lowered down to to the boat to give heart massage to Ben.
The RNLI said the boat should not have been out in the conditions
He was airlifted to Ysbyty Gwynedd, Bangor, where a medical team was waiting, but was later pronounced dead.
The Beaumaris inshore lifeboat took the grandfather and his shocked, but uninjured son to an ambulance waiting at the shore. The grandfather was pronounced dead at the hospital.
John Broughton of Beaumaris RNLI said: "The weather, as forecast, deteriorated, and this sort of vessel certainly shouldn't have been on these waters in the forecast conditions.
"It was definitely not suitable."
A coastguard spokesman said: "This is a dreadful incident and the coastguard are particularly saddened that the two who died are from the same family.
"We don't know how long they had been in water and you can suffer a rapid heat loss in that temperature of water."
Holyhead Coastguard said there were force six weather conditions, with 1.5m waves at the time of the alert.