KABUL — The Afghan intelligence service said Friday that it had seized a massive truck bomb packed with 17,200 pounds of explosives on the outskirts of Kabul.
Shafiqullha Tahiri, a spokesman for the intelligence service, said agents also killed five suspected suicide bombers and arrested two others during a raid early Wednesday when the truck was seized.
He said all were suspected members of the militant Haqqani network, which is closely allied with the Taliban.
Tahiri said the explosive material was disguised as bags of cement, a trademark method of the Haqqanis, who are known for conducting spectacular attacks. He said agents also seized several suicide bomb vests, rocket-propelled grenade launchers, and hand grenades.
Earlier this week, General Joseph Dunford, the top US commander in Afghanistan, warned that recent anti-US statements by President Hamid Karzai could increase the risk of an attack on American troops.
Dunford told his top officers that Karzai’s remarks could trigger more ‘‘insider attacks,’’ in which disgruntled or radical Afghan troops or police officers turn their weapons on US troops. One such attack in Wardak province this week left two US Special Operations troops dead.
Over the past month, Karzai has accused the United States of collaborating with the Taliban, torturing Afghan civilians, kidnapping university students, and deliberately violating his country’s sovereignty.