KABUL (Reuters) - At least five Taliban were killed when suicide bombers attacked a NATO-run base in eastern Afghanistan on Friday, NATO and Afghan officials said, the latest assault in the volatile Taliban stronghold. A spokesman for the NATO-led International Security Assistance Force (ISAF) said the attack was launched on a forward operating base (FOB) in Gardez city in Paktia province, not far from Afghanistans porous border with Pakistan. The attack began when a vehicle, followed closely by four suicide vest-wearing insurgents, attempted to breach a fortified area of the base, ISAF said in a statement. It said the vehicle was destroyed and the remaining attackers killed as they fled. There were no ISAF casualties, the statement said. US troops make up most of the ISAF force in Paktia and a US-run provincial reconstruction team is based in Gardez. Rohullah Samon, a spokesman for the Paktia Governor, said an Afghan security guard and an Afghan soldier were wounded. Zabihullah Mujahid, a Taliban spokesman, said 10 of the groups fighters were involved and said some had managed to go inside the base. In the northern city of Mazar-i-Sharif, a child was killed and 28 civilians wounded when a suicide car bomber attacked a passing ISAF convoy, a spokesman for the governor of Balkh province said. The bomber blew up an explosives-laden sedan on a highway in the northern province of Balkh as the NATO convoy approached, Abdul Rauf Taj, a senior police commander said. The official said: Twenty-eight people in a bus which was passing at the time of the blast were injured. One child was killed in the blast, Taj said, blaming the attack on the enemies of peace. A spokesman for NATOs International Security Assistance Force (ISAF) confirmed the attack but said it caused no military casualties. Afghan President Hamid Karzai condemned the attack.