The Afghan intelligence service has seized a truck bomb packed with 17,200lbs of explosives on the outskirts of Kabul.
Spokesman Shafiqullha Tahiri said yesterday that agents also killed five suspected suicide bombers and arrested two others during a raid early on Wednesday when the truck was seized.
He said all were suspected members of the militant Haqqani network, which is allied with the Taleban.
Mr Tahiri said the explosive material was disguised as bags of cement, a trademark method of the Haqqanis, who are known for spectacular attacks .
Agents also seized several suicide bomb vests, rocket- propelled grenade launchers and hand grenades.