Afghan officials say a suicide blast has killed at least 10 people in a city in central Uruzgan province during a visit by the U.S. ambassador.
Police say the attacker detonated explosives strapped to his body near the governor's headquarters in the city of Tarin Kot. Some 50 people were wounded in the attack, but the ambassador, Ronald Neumann and other U.S. officials were unhurt.
Shortly after the blast, local news agencies said a Taleban spokesman phoned claiming responsibility for the attack.
Earlier this week, a suicide car bomber wounded an American soldier and two other people in southern Afghanistan.
This week's attacks are the latest in an upsurge in attacks by suspected Taleban supporters in southern and central Afghanistan, where more than 1,500 people were killed in insurgent-related violence last year.
Some information for this report provided by AP and Reuters.