A third Briton shot while on a Muslim pilgrimage to Iraq has died, as the two other British victims are being buried.
The pilgrims were travelling to Baghdad airport when attacked
Yahya Gulamali, 60, from London, died overnight in hospital after being shot during the ambush on Monday.
Meanwhile, the bodies of victims Husain Mohammedali, 50, and Saifuddin Makai, 39, from London, were taken to a Shia cemetery near Baghdad on Tuesday.
A bomb went off near the convoy, but there were no casualties, police said.
The Britons had been on a tour of Shia holy places, when they were reportedly shot as their minibus neared a checkpoint in the Dora neighbourhood, on the way to Baghdad airport on Monday.
An Iraqi driver was also killed and two other British Shia Muslims and an Iraqi injured in the shooting.
The British Embassy in Baghdad said Mr Gulamali, from Greenford in west London, was operated on by doctors at a hospital in Baghdad's Green Zone after being shot in the back and stomach.
He later died in hospital from his injuries.
On Tuesday, Iraqi police said Mr Mohammedali and Mr Makai's bodies were escorted by six police vehicles on their way to the cemetery where they were to be buried.
A roadside bomb reportedly went off as the convoy passed through the town of Latifiya on its way to Karbala.
The Husaini Mosque in Northolt, west London, said Mr Makai, from Streatham, south London, left behind two sons and a daughter, while Mr Mohammedali, from Harrow, had three daughters and a son.
Shabbir Abidali, a trustee of the mosque, said the two men were "very close friends".
"Everybody, upon hearing, has just left their jobs and whatever they were doing and come and gathered together to support one another and support the families who have been affected," Mr Abidali told BBC News.
"They are very close friends and colleagues and we are all shocked, I don't know how to describe the feelings. We are trying to help the immediate families," he said.
He said the group had been on a pilgrimage to holy shrines at Kerbala, Najaf and Kufa.
The mosque named the British man and woman injured as Ali Quaiyoom and Ms Zehra Jafferji.
Survivor Zara Jafferti said the group had been in Iraq for five days
One of the survivors of the attack told BBC correspondent Caroline Hawley that as they travelled on a dual carriageway at about 40kmh, he heard what sounded like fireworks.
He said all the glass in the minibus shattered as they were shot at for about one minute.
Meanwhile, hostage experts are hunting for a Briton abducted in Baghdad with three other westerners on Saturday.
A multi-national hostage team is trying to find Norman Kember, a retired professor in his 70s from Pinner, in north west London, who is an aid worker in Iraq.
Foreign Secretary Jack Straw said the government's advice was that UK citizens should not travel to Iraq.
"The only exceptions are where they are subject to proper security protection. That is clear, it's explicit."