A suicide bomber struck outside the headquarters of the governor of an eastern Afghan province on Monday, killing at least one person, but the governor escaped unhurt, officials said.
Violence has been at its worst this year in Afghanistan, the bloodiest period since Taliban's ouster in 2001, with the militants making a come back despite the presence of almost 150,000 foreign troops.
The attack in the heart of Jalalabad, the capital of Nangarhar province, happened during the morning rush hour as a group of officials were entering the compound.
A district chief for Nangarhar was killed, officials said, but governor Gul Agha Sherazi, target of several attacks by the Taliban in the past, was unharmed, his spokesman said.
Sherazi was inside the compound when the attack happened. "It was a suicide attack. The district chief has been killed and four people have been wounded," Esmatullah, a senior army officer said.
Flames could be seen rising from the site of the blast and security forces had cordonned off several roads leading to the area in the city which lies near the border with Pakistan.
The Taliban largely rely on suicide attacks as part of their campaign against the foreign forces and the Afghan government.