Afghanistan ? Security forces defused two roadside bombs near the heavily guarded U.S. Embassy and arrested a suspected suicide attacker driving a minibus packed with explosives and gas canisters close to a U.S. base, officials said.

The thwarted attacks came as international donors gathered in London to discuss Afghanistan’s future.

The two roadside bombs were discovered in a ditch about 300 yards from the U.S. Embassy in the capital, Kabul, said Ehbrar Ahmad, a senior official with a police commando squad.

The minibus bombing was foiled about a half-mile from the Kandahar Airfield, the main U.S. base in southern Afghanistan, Afghan army commander Gen. Rahmatullah Raufi said.

The vehicle was packed with more than 130 pounds of explosives, drums of gasoline, as well as the gas canisters.