Afghanistan ? A plane carrying U.S. drug enforcement officials slammed into tents and mud brick houses Monday while trying to avoid a truck on a runway, killing two people on board and two girls on the ground.

At least 13 people were injured, including several Americans, after the Russian-made, twin-engine An-32 aircraft plowed into a nomad settlement on landing at an airport in Lashkar Gah, capital of Helmand province.

Two of the 16 people aboard the plane – 12 passengers and four crew – were killed, said Canadian military spokesman Maj. Quentin Innis. Eight others were injured and flown by helicopters to a U.S.-led coalition hospital in Kandahar, about 75 miles away.

The two dead on the plane were Ukrainian flight crew members. The U.S. Embassy said several of the 11 Americans aboard were injured. The nationality of the other passenger was unclear.

Two Afghan nomad girls, aged 2 and 3, were crushed to death in their mud brick homes as they slept, their mothers said. At least five other people were injured.