About 50 people were killed and 60 others wounded when a suicide blast ripped through large crowds gathered to watch a volleyball game in eastern Afghanistan on Sunday, officials say.
The attack, the deadliest blast in Afghanistan since 2011, struck during a tournament between three local teams in Paktika province, a volatile region bordering Pakistan.
"The suicide attacker was on a motorcycle, he detonated himself in the middle of a volleyball match," Attaullah Fazli, deputy governor of Paktika, said.
"A lot of people including some provincial officials and the police chief were there. About 50 people have been killed, and 60 injured, a lot of them seriously."
Most of the casualties were civilians, a spokesman said. The Taliban insurgency and other jihadist militants have unleashed waves of suicide attacks and assassinations in Afghanistan this year, as foreign forces continue to withdraw after 13 years of war.
About 12,000 international troops will remain in Afghanistan next year to train and support Afghanistan's security forces.