Gunmen in Pakistan have torched at least 10 oil tankers² carrying fuel for Nato vehicles in Afghanistan in the latest such attack in the country.

巴基斯坦境内最近发生多起袭击事件，持枪歹徒烧毁至少10辆向阿富汗运送燃料的北约运油车。

Fourteen gunmen in two pick-up trucks opened fire on the tankers

A driver was also killed in the attack near the south-western city of Quetta.

There have been several ambushes³（埋伏，伏击） on tankers in the past week since one of the main border routes into Afghanistan was shut by the Pakistani authorities.

The Torkham crossing was closed after three Pakistani soldiers were killed in a Nato helicopter strike in Pakistan.

Islamabad has not yet said when the border post will be reopened.

Fourteen gunmen in two pick-up trucks opened fire on the tankers which were parked by the roadside on the outskirts⁴（市郊） of the city of Quetta.

The tankers were thought to have been en route to（在途中） a smaller border crossing into Afghanistan that still remains⁵ open.

This is the fourth such attack in six days. The Taliban have said they carried out some of the assaults in retaliation⁶（报复，反击） for Nato helicopter incursions（入侵，侵犯） .

The latest attack comes a day after a bomb damaged an oil tanker¹ in the Khyber tribal⁷ region.

The tanker was parked alongside more than 100 other trucks waiting to enter Afghanistan. No-one died in the incident.

On Friday, nearly 30 Nato supply lorries were set on fire in the southern province of Sindh.

Nato says the trucks passing through Pakistan carry fuel, military vehicles, spare parts, clothing and other non-lethal supplies for foreign troops in Afghanistan.

The Nato-led International Security Assistance Force (Isaf) said on Monday that its operations were so far unaffected by the attacks but that it was "beginning to explore other options".

Supplies are currently brought into northern Afghanistan via Uzbekistan and Tajikistan but the spokesman declined to say which northern route was being considered.

The other main Nato crossing from Pakistan to Afghanistan - Chaman in Balochistan - remains open.