A file photograph shows US soldiers coming out of a US CH-47 Chinook helicopter in Sarobi district to meet Afghans

A Nato helicopter crashed during a battle with the Taliban in  Afghanistan, killing 31 US soldiers and 7 Afghans, the Afghan president said yesterday, a devastating toll and easily the worst single incident for foreign troops in 10 years of war.
A brief statement from the presidential palace said the troop-carrying Chinook helicopter had crashed in Syedabad in central Maidan Wardak province, just to the west of the capital, Kabul, and identified the Americans as special forces troops.
The Taliban quickly claimed to have shot down the helicopter during a firefight, although the Islamist militant group often exaggerates incidents involving foreign troops or Afghan government targets.
They also said eight insurgents had been killed in torrid fighting.
“They wanted to attack our muhahideen who were in a house, but our mujahideen resisted and destroyed a helicopter with a RPG (rocket-propelled grenade) rocket,” Taliban spokesman Zabihullah Mujahid said by telephone from an undisclosed location.
“Eight mujahideen were martyred and 38 Americans were killed and today they (U.S. soldiers) carried away parts of their plane and shattered pieces of their bodies.” 
The Nato-led International Security Assistance Force (ISAF) earlier confirmed that a helicopter had crashed but gave no information about the possible cause or casualties.  
Afghan President Hamid Karzai “shared his deep sorrow and sadness” with US counterpart Barack Obama and the families of the US and Afghan victims, the palace statement said.
Afghanistan’s Defence Ministry spokesman, Zaher Azimy, also said the helicopter had crashed. He said the Afghans killed had also been from a commando unit.
“The incident is under investigation right now as this helicopter belongs to international forces,” Azimy said television. “Obviously they will provide details of the crash and the reason.”
The high casualties come only two weeks after the start of a gradual process of handing security responsibility from foreign forces to Afghan troops and police, and at a time of growing unease about the increasingly unpopular and costly war.
That process is due to end with all foreign combat troops leaving Afghanistan by the end of 2014, but some US lawmakers have already questioned whether that handover is fast enough.
Incidents with heavy death tolls are sure to raise even more questions about the transition process and how much longer foreign troops should stay.
The crash was by far the worst incident of the war for foreign troops and easily surpassed the worst incidents of battlefield losses.
In April 2005, another CH-47 Chinook helicopter crashed, killing 15 U.S. servicemen and three civilian contractors.  Another Chinook crash in June the same year killed 17 US  troops.
US and other Nato commanders have claimed success in reversing the momentum of a growing insurgency in the Taliban heartland in the south, although insurgents have shown a worrying ability to adapt their tactics and mount major attacks in other areas.
Those gains, however, have come at a price, with 711 foreign troops killed in Afghanistan in 2010, easily the deadliest year of the war for all concerned since the Taliban were toppled by US-backed foreign troops in late 2001.
The crash in Maidan Wardak means that at least 374 foreign troops have been killed so far in 2011, more than two-thirds of them American, according to independent monitor
www.icasualties.com and figures kept by Reuters.
Neither ISAF nor the US military in Afghanistan confirmed whether there had been any casualties in the crash despite repeated telephone calls, much less any nationalities that might have been involved. 
The majority of foreign troops in Wardak, which comes under ISAF’s eastern regional command, are American.