Abdul Rahim Wardak's remarks came after a suicide car bomber today rammed a vehicle filled with explosives into a U.S.-Afghan military convoy, killing three Afghan civilians and wounding four others.

Today's attack came two days after militants used twin suicide car bombs to attack NATO peacekeepers in the capital, Kabul. Authorities blamed Al-Qaida for those blasts, which killed a German soldier and eight Afghans.

Wardak says that recent intelligence reports indicate that al-Qaida operatives, working in tandem with Taliban militants and what he described as "some other fundamentalists," are preparing the insurgency.

Wardak also said that the recent suicide bombings in Afghanistan were conducted by foreigners. He described this as "a new trend."

(Agencies)