Pul-I-Alam: A powerful truck bomb exploded near the gate of a Nato base in Afghanistan Friday, killing one person and wounding as many as 70 others, including a foreign soldier, officials said.

The Taliban claimed responsibility for the suicide attack at Combat Outpost McClain in Muhammad Agha district of Logar province, south of the capital Kabul, which took place at around 8am (0330 GMT).

The blast outside the small base could be heard for several kilometres, an AFP reporter in the area said, and was described as "huge" by local police chief.

Logar provincial governor Atiqullah Ludin said an Afghan carpenter who had just entered the camp through the gate was killed in the attack, while seven others - five police and two intelligence officials - were wounded.

But Logar's health director, Mohammad Zarif Nayebkhail, told AFP up to 70 people from the surrounding area were taken to hospital with injuries from shrapnel or flying glass.

Wounded taken to hospital

"Up to 70 wounded have been taken to the main hospital in the district - seven of them are (Afghan) security guards of Nato, the rest are civilians," he said.

"Several of the wounded were in a serious condition." Nato's US-led International Security Assistance Force (ISAF) said that one coalition soldier was wounded.

ISAF said none of its troops were killed and it is not thought the blast breached the base's perimeter. Logar's deputy police chief Mohammad Aboud described the explosion as "huge", adding it had destroyed some homes nearby.

"The suicide attacker wanted to ram his explosive-laden vehicle into the coalition forces base but he was stopped at the gate and detonated the truck outside the base," he said.

Haqqani

In September, 77 US troops were wounded in a truck bombing which targeted a Nato base in Wardak province, which neighbours Logar.

US officials blamed that attack on the Haqqani network, an Afghan Taliban faction whose leaders are based in Pakistan's northwestern tribal belt.

Civilians are increasingly caught up in the Afghan war. The United Nations says civilian deaths in the first half of this year rose by 15 per cent to 1,462, with insurgents responsible for 80 per cent.

140,000 international troops

There are currently 140,000 international troops in Afghanistan fighting a decade-long, Taliban-led insurgency alongside Afghan government forces.

Foreign combat troops are due to leave by the end of 2014 but a substantial presence is expected to remain to train Afghan security forces.