A service was held at a US air force base on Sunday for an engineer's wife and three children who died in a car crash on Friday.
Police are asking witnesses to contact them
Cortina Hamilton, 20, from Ely, Cambridgeshire, and her children were killed in the accident at Kenny Hill near Mildenhall in Suffolk.
Mrs Hamilton and sons Jalin Brent, aged five, and 23-month-old Malik Hamilton, and daughter Alyssa Hamilton, aged three, died at the scene of the crash on the A1101 on Friday evening.
Police said her Honda Accord landed on its roof in a water-filled ditch after being in collision with a Vauxhall Vectra.
A man - who also works at RAF Mildenhall - and a woman travelling in the Vectra suffered minor injuries.
Base in shock
Mrs Hamilton's husband is an aircraft maintenance engineer at RAF Mildenhall where prayers were said for the family.
A spokesman said he was being cared for by support workers and that staff at the base were in shock.
He said the family was American but could not say where in America they came from or how long her husband had been at Mildenhall.
Senior officers were making sure that the family's relatives in America had all been informed of the tragedy before further personal details were released to the media, he said.
Around 12,000 United States Air Force service
men and women and their families are based at Mildenhall.