At least 13 people have been killed in a suicide bomb attack in the eastern Afghan city of Jalalabad.
The blast appears to have targeted the home of a tribal elder, where a group had gathered to celebrate his son being released from Taliban captivity, local authorities reported.
The son was among those killed.
A spokesman for the provincial governor said the elder and at least 13 other people were wounded in the explosion.
No one has claimed responsibility for the attack, however a Taliban spokesman denied the group was involved.
Afghanistan has been the target of several bomb blasts in recent weeks, hindering the latest efforts to recommence a peace process with the Taliban.
A week earlier the self-titled Islamic State — or ISIL — claimed its first attack on a major town centre in Afghanistan. Its assault on the Pakistani consulate in Jalalabad killed seven people.