KABUL (AFP) - Five US soldiers were killed in Afghanistan on Tuesday, Nato said, as the number of Americans to die in the war in the past four days climbed to 22. Four soldiers were killed in eastern Afghanistan in a Taliban-style bomb attack, Natos International Security Assistance Force (Isaf) said. The fifth died in an insurgent attack in the south of the country, where the insurgency is at its fiercest, it said in a separate statement. A spokesman confirmed to AFP that all the dead were Americans. The deaths bring to 485 the total number of foreign troops killed in the Afghan war this year, compared to 521 for all of 2009, according to an AFP tally based on that kept by the independent icasualties.org website. The deaths come a day after eight Nato troops - seven of them American and the other an Estonian - were killed in bomb attacks in southern Afghanistan. French military officials said Tuesday that a soldier serving in Afghanistan was killed when the armoured vehicle he was travelling in tumbled into a ravine Monday during an operation in the Uzbeen valley. Canada lost its 152nd soldier of the Afghan war when a corporal died from injuries sustained from an IED on August 22. Altogether, the coalition has lost 2,053 soldiers in the war. Meanwhile, international aid agency Oxfam has suspended its operations in a northern region of Afghanistan after three local staff members were killed by a roadside bomb, a spokeswoman said in statement issued in London on Tuesday.