Afghanistan bomb: UK to 'look carefully' at use of vehicles Link to video: Afghanistan bombing: three British soldiers' deaths 'surprising' David Cameron has said the government will "look carefully" at the use of heavily armoured vehicles after three British soldiers were killed in Afghanistan by a roadside bomb while travelling in a Mastiff troop carrier. The prime minister paid tribute to the soldiers and said British troops have paid a "very high price" in Afghanistan. Speaking on The World at One on Radio 4 on Wednesday, the prime minister said he had been told by troops on his recent visits to Afghanistan that they were satisfied with the equipment. But asked whether it was necessary to look at the effectiveness of armoured vehicles, Cameron said: "That is right. We will want to look at that carefully. We have done an enormous amount to improve the quality and quantity of protective vehicles that our soldiers use out in Afghanistan. This particular vehicle, as I understand it, had a pretty good record of withstanding blasts from IEDs. So I am sure we will want to look at that carefully and put in place everything we can to make sure that our brave men and women have the best protective equipment.. The Ministry of Defence said on Wednesday the men had been killed on Tuesday in the Nahr-e Saraj district of Helmand province, on the border of Kandahar just north of the provincial capital Lashkar Gah. It is understood six other Britons were injured in the explosion, which happened while the soldiers were inside the Mastiff troop carrier - a 15-tonne vehicle which is regarded as one of the safest operated by the British military. The soldiers who died were from the Royal Highland Fusiliers 2nd Battalion, Royal Regiment of Scotland, and can only have been in the country for a few weeks. The MoD said the injured men received immediate medical attention and were evacuated by air to the military hospital at Camp Bastion, but three could not be saved. Next of kin have been informed. The other soldiers hurt are not thought to have life-threatening injures. The Mastiff is one of a number of fortified vehicles used by the British in Afghanistan that have helped to reduce the number of troops killed and injured by roadside improvised explosive devices. Investigators will try to establish when the IED was planted - some incidents have involved devices planted years ago. This roadside bomb must have been on a huge scale to have caused such damage, officials noted. Though the UK has handed over lead responsibility for fighting the Taliban to the Afghan National Security Forces, British troops are still providing support to the local army and police, often in mentoring and support roles. Major Richard Morgan, spokesman for Task Force Helmand, said: "It is with deep sadness that I must confirm that three soldiers from The Royal Highland Fusiliers, 2nd Battalion The Royal Regiment of Scotland, have died after their vehicle was struck by an improvised explosive device in the Nahr-e Saraj district of Helmand province. The deaths take the number of UK service members who have lost their lives since operations in Afghanistan began in 2001 to 444. The insurgents warned that they would infiltrate enemy ranks to conduct "insider attacks" and target military and diplomatic sites with suicide bombers.