HERAT (AFP) - Up to 50 Taliban insurgents have been killed in Afghanistans western Farah province after clashes that left seven Afghan and two US soldiers dead, government officials said Sunday. Militants fired mortar rounds at a military-escorted convoy of humanitarian supplies in Farah province on Saturday, sparking clashes, explosions and an airstrike by NATO forces helping fight a bloody Taliban insurgency here. The information we received from the ANA (Afghan National Army) is that in this clash seven ANA soldiers were killed and 12 were wounded, Farah governor Rohul Amin Amin told AFP. Around 40 to 50 Taliban were killed. Two American soldiers were killed. One ISAF vehicle was damaged, he said, referring to the NATO-led coalition, the International Security Assistance Force. NATO airplanes then bombed, and the information we have received was that the casualties were not significant from the airstrike. The Taliban who were killed were because of ground clashes with the ANA and ISAF. The defence ministry said that 'tens of terrorists were killed in the incident, but added it had no reports of civilian casualties. An ANA spokesman had already confirmed their soldiers deaths, while a US Forces spokesman said on Saturday their two service members died in a blast in Farah, which has seen increasing levels of militant-linked unrest. Local officials have also said that two women were killed in the same incident when one of the mortars fired by the Taliban struck their house. In other unrest, the defence ministry said five ANA soldiers were killed in clashes and mine blasts in southeastern Ghanzi province. Eleven more militants were killed by foreign and local forces in northern Kunduz province, the defence ministry said in a statement, while in western Herat, two Taliban and one policeman died in clashes, a police chief said. During other fighting in eastern Paktika province, four militants were killed, the defence ministry said. The attacks come as Afghanistan faces its worst violence in the eight-year war following the ouster of the hardline Taliban regime in late 2001, and amid political turmoil following fraud-tainted presidential elections last month.