We, the soldiers killed by a bomb Afghan

 about 200 foreign soldiers were killed in Afghanistan so far this year seven US soldiers were killed by a bomb in the South of the Afghanistan, American officials say.

The incident is the most deadly single attack on foreign troops in a month. Initially, NATO confirmed the death but refused to disclose the nationalities.

Earlier, a NATO helicopter crashed in the East of the Afghanistan, killing one soldier, officials said.

About 200 foreign soldiers were killed by militants in Afghanistan so far this year.

Tafsir Khogyani, Commander of the border to the South of the Afghanistan police, told the BBC Sarwary Bilal in Kabul: "according to our initial information from police Coalition and Afghan went to destroy a container Taliban who had explosives and weapons." As soon as the helicopter landed and were patrolling the other forces of ISAF, the explosion took place.

"It took place in the district of Shorabak 19 kilometres (12 miles) from the Pakistani border."

Shorabak district lies between the districts of Registan and Spin Boldak.

Spin Boldak police that Chief Gen Abdul Raziq told the BBC that insurgents had been allowed in the region only two months ago.

Contested claim

During this time, led by NATO forces say that they have pushed Taliban fighters in a district in the Eastern province of Nuristan.

Local officials said up to 500 insurgents seized the Doab district on Wednesday.

The mission of international security challenges the account given by local leaders. "At no point was the centre of district of saturation, the Taliban were never in control,", said the spokesman for the ISAF Maj Tim James.

Afghan troops and NATO arrived in the district Wednesday afternoon and made a number of air strikes, he said.

"The area quiet Afghan troops and NATO much in control," said Maj. James.

It is very difficult to confirm the claims of NATO or how far their control extends in the district. The Governor of the province said that close to 30 insurgents were killed on Wednesday - but questions remain on the comings and goings of hundreds of others.

Our correspondent says that the mountainous area has several hideouts.

He said officials in Nuristan warning for more than a year that the Government and NATO should do more to counter the militant threat in the region.