There has been a 40 percent increase in attacks by insurgents in eastern Afghanistan compared with the same time last year, says Nato.
The figures come against a backdrop of increasing concern in the West about the ongoing war and instability in areas bordering Pakistan.
Only yesterday, militants attacked and destroyed a supply column near Saydabad, in Wardak province just 70 kilometres from Kabul. More than 40 trucks carrying food, water and fuel were hit.
The attackers fled only when a helicopter and Afghan army units backed by foreign security forces arrived on the scene.
One local resident, Hajji Estmatullah, described what happened: “The Taliban came and shot one soldier and took a four wheel drive vehicle and five trucks with them.”
NATO confirmed the incident and said there were reports of casualties but provided no details.
Nearly 2,000 people have died in insurgency related violence so far this year, including more than 100 foreign troops.