KABUL (AFP/Reuters) - Four American and 10 Afghan soldiers were killed Tuesday in a clash in the eastern Afghan province of Kunar, local authorities and the US military said. Fighting is continuing in the district of Sirkanay, the head district official, Hamisha Gulab Shinwari, told AFP. The Afghan and international forces confronted the Taliban.... In the clash, 10 Afghan soldiers and four American soldiers were killed and 10 other soldiers were injured, he said. The frontier police, who took part in the fighting, lost one man and five police were injured, he added. The death of the four Americans brings to 329 the number of foreign soldiers killed in Afghanistan this year. Of that number, 190 were American. A suicide bomber attacked a Nato convoy outside a military airport in Kabul Tuesday, killing three civilians and wounding 10, including six Afghan civilians, three US soldiers and one from Belgium, in a fiery vehicle blast claimed by the resurgent Taliban, officials said. It was a suicide attack outside the main gate of the military base at the airport, said Col Koziel Bart, a spokesman for the Nato-led International Security Assistance Force (Isaf). A shopkeeper who witnessed the blast told Reuters the suicide bomber had detonated his explosives close to one of the entrances of the military side of the airport. Huge flames could be seen rising from the site of the blast and the wail of sirens could be heard several kilometres from the civil-military airport that has seen a series of Taliban rocket attacks and a suicide strike in the past. Zabihullah Mujahid, a Taliban spokesman, said by telephone from an undisclosed location that the militants were responsible for the blast, targeting Western forces. An Afghan soldier, Mohibullah, who said he had witnessed the blast, said two foreign soldiers had been killed, however this could not immediately be confirmed by the NATO-led force. Meanwhile, twelve Taliban and one Afghan policeman have been killed and 18 militants were wounded in a six-hour gunbattle and related bomb blast in Dahana-i-Ghori district of Baghlan province, where Taliban fighters had taken control of part of the highway, said provincial Governor Mohammad Akbar Barikzai.