Twenty Taliban suicide bombers Wednesday launched an attack on the main military base of Bagram, 50 km north of Kabul, the capital city of Afghanistan, a Taliban spokesman said.

Zabihullah Mujahid, a spokesman of the Taliban insurgent group, told Xinhua through telephone from an unidentified location that four of the attackers have exploded themselves close to the military base.

Local media reported that the clash between the militants and the NATO-led International Security Assistance Force started at around 05:00 p.m. local time and was going on at the moment, leaving seven militants killed.