Officials say a suicide bomber has attacked a NATO-led convoy in the eastern Afghan province of Khost, killing at least 20 people.
Local officials said 17 Afghans, including civilians and security forces, were killed and more than 30 others were wounded in the attack in the provincial capital, Khost.
The U.S. Embassy in Kabul said three NATO service members and an Afghan interpreter were among the dead.
The troops killed reportedly were Americans.
There were conflicting reports about whether the bomber was on a motorcycle or driving a car.
In southern Afghanistan, police said a roadside bomb attack killed at least six civilians traveling on a tractor in Puli Alam, the capital of Logar Province.
Based on reporting by AFP, AP, Reuters, and dpa