ISLAMABAD - The deadliest incident in which 30 US soldiers and eight Afghans were killed as a result of helicopter crash in central Maidan Wardak province the other day has raised many eyebrows within Afghan government and the Nato. Well-placed diplomatic sources told TheNation on Sunday that Nato has launched investigation whether the Chinook helicopter carrying the US soldiers was shot down, as claimed by Afghan Taliban, or a technical fault led to its crash. Sources were perturbed over the claim of Taliban according to which Chinook crashed as a result of a rocket-propelled grenade fired by them. This is a very serious incident that happened at a time when the US-led multinational forces have started handing over responsibility of security to Afghan security forces, the sources said. They were of the opinion that if that was the case then it raises many questions ranging from Taliban determination to keep resisting the foreign forces in Afghanistan to the US ambitions to retain some bases and soldiers after 2014. This is a clear message from Taliban to all and sundry that they can create such situation any time if denied due role in countrys future politics, a source said. However, some sources were still of the view that such an episode was beyond the capability of Taliban and the US military commanders might have planned it to secure a strategic deal with Afghan government for retention of some of its troops for next three to four decades. It is evident from the fact that Afghan government and parliament are averse to the US proposals and had therefore launched peace and reconciliation process to woo Taliban top leadership by offering them political role for long-term security and stability in the region. However, this proposition, according to the sources, is in direct conflict to the US interest that does not envisage any political role for Taliban in the future. They cited the statement of US Ambassador to Afghanistan Ryan Crocker that he gave few days back in which he ruled out the possibility that Taliban would have any political role in Afghanistan. Ambassador Crocker had also ruled out the possibility that Afghan Taliban would be included in the forthcoming conference of Afghanistans immediate and near neighbours to be held in Turkey in November. Sources were of the view that such a strategy of the US would not bear fruits as long as Taliban militias resisting the US-led forces for a decade were offered pacified by offering them political role for long term peace and stability in the war ravaged country.