Peshawar: More than 40 NATO vehicles were destroyed in two separate Taliban attacks in Pakistan on Wednesday as the militants stepped up their efforts to disrupt supply routes into Afghanistan.
In the latest attack, at least 26 NATO oil tankers were torched when militants opened fire on a convoy of dozens of vehicles parked in Nowshera in northwestern Pakistan, police said.
Earlier, militants attacked a depot housing 40 NATO oil tankers on the outskirts of the southwestern city of Quetta, killing a member of staff and destroying at least 18 vehicles.
In Islamabad, meanwhile, the US ambassador apologised for the deaths of two Pakistani soldiers in a helicopter strike last week which led to the main border crossing into Afghanistan for NATO trucks being closed, causing more disruption to supplies.
The Nowshera incident was the fifth of its kind in a week, with around 100 vehicles torched and four people killed so far.
The Pakistani Taliban claimed responsibility for both of Wednesday`s attacks, along with the previous raids.
They vowed more attacks to disrupt NATO`s supply route through Pakistan and to avenge a new wave of US drone strikes targeting Taliban and al Qaeda militants linked to an alleged terror plot against European cities.
"We will further intensify attacks with the intensification of US drone strikes on us," Tehreek-e-Taliban spokesman Azam Tariq said.
Two US missile strikes on Wednesday killed eight people in Pakistan`s tribal northwest -- home to the alleged European plot.
A security official said two missiles hit a militant compound in Miranshah, the main town in tribal North Waziristan, where foreign militants are believed to have hatched the plan to launch Mumbai-style attacks on European cities.
Hours later, at least three militants were killed in a drone strike on a house in Mir Ali, in the same area, security officials said.
The United States has massively ramped up its drone campaign in Pakistan`s lawless northwest tribal region on the Afghan border, which it calls the global headquarters of al Qaeda.
Pakistani authorities have reported 26 attacks since September 03 which have killed around 150 people in the region, a hub for homegrown and foreign militants fighting in Afghanistan.
Pakistan`s Ambassador in Washington, Hussein Haqqani, told the BBC that the increase in strikes in North Waziristan came after intelligence agencies uncovered the plot to "attack multiple targets in Europe".
He also said that a drone strike on Monday in the district which killed eight militants, including five Germans, was linked to the plot.
The al Qaeda plot reportedly targets Britain, France and Germany with a wave of commando-style attacks on key landmarks including Paris` Eiffel Tower and Notre Dame Cathedral and Berlin`s Brandenburg Gate.
French police on Tuesday arrested 12 people and seized guns in a series of anti-terror raids.
The United States does not as a rule confirm drone attacks, but its military and the Central Intelligence Agency operating in Afghanistan are the only forces that deploy the pilotless aircraft in the region.
The latest tanker attacks came as the main land route for NATO supplies crossing from Pakistan to Afghanistan remained closed for a seventh day running.
Pakistan shut the route at Torkham in protest at a cross-border NATO helicopter attack that killed at least two Pakistani soldiers.
The US Ambassador to Pakistan, Anne Patterson, apologised on Wednesday for their deaths, describing the incident as a "tragic accident".
In Afghanistan, the US-led International Security Assistance Force said its forces had believed they were acting in self-defence and its commander, US general David Petraeus, said it would work with Pakistan "to ensure this doesn`t happen again”.
Since the key route closed, tankers carrying fuel to the 152,000-strong NATO forces fighting the Taliban-led insurgency in Afghanistan have been attacked near the capital Islamabad, in Baluchistan and in Pakistan`s south.
Some 6,500 lorries are at a standstill, Khyber transport association president Shakirullah Afridi said.
"The problem is that American drone attacks are increasing and the Taliban are now taking revenge on us. We have no place to go," said Afridi.
US air strikes in Pakistan have raised tensions between the two allies, with Islamabad condemning them as a violation of its sovereignty.
The strains may be exacerbated by a White House report to Congress Wednesday which warned Pakistani forces were avoiding "direct conflict" with the Afghan Taliban and al Qaeda.
The report said the Pakistani military had continued operations against insurgents in lawless South Waziristan, but added that soldiers stayed close to roads and that operations were progressing "slowly".
It saw "bright spots”, but only modest overall success, for the US surge in Afghanistan.