An explosion at a mosque in the eastern Afghan province of Khost on May 6 has killed at least 10 people and wounded another 30, officials said.
The bomb had been placed in a tent being used as a voter registration center on the grounds of a mosque, Khost provincial police chief Abdul Hanan Zadran told AFP.
Abdul Wali Wahidzai, a provincial council member, said the number of casualties might increase as the information at the moment is preliminary.
No one immediately claimed responsibility for the attack.
Last month, a suicide bombing outside a voter registration center in Kabul killed at least 57 people and wounded 119 others.
The extremist group Islamic State claimed responsibility for the attack in a heavily Shi'ite-populated area in the Afghan capital.
Afghan parliamentary and provincial council elections are scheduled for July 20.
In a separate incident, a vehicle carrying shopkeepers on their way to a market struck a roadside bomb in Afghanistan's northern Faryab Province, killing seven of them.
