A Nato helicopter crashed in eastern Afghanistan on Thursday killing one soldier in the incident, Coalition said in a statement.

Coalition said that the cause of the crash remains unknown and investigations are underway.

There is no information about nationality of the soldier killed in the incident.

The death brings the number of foreign forces killed in Afghanistan to 192 so far this year.

More than 140 US troops, 18 from British and 34 soldiers from other countries have been killed since the beginning of 2011.

Most US soldiers are based in the east of Afghanistan fighting against militants.

Violence has recently increased in the eastern Afghanistan and Afghan and foreign forces have launched military operations to clear militants.

It comes as the US president Barack Obama on Wednesday said that Afghan power transition will be completed by 2014.

International forces in Afghanistan are 'preparing to turn a corner' towards transition and an eventual political settlement, US President Barack Obama said in London.

Foreign forces are to hand over security responsibilities of seven areas to Afghan forces in the first phase of transition in July.

NATO helicopter down