At least 13 people died in a suicide attack on an Afghan election campaign rally on Tuesday.
Another 25 people were wounded when the militant blew himself up among supporters of parliamentary candidate Abdul Nasir Mohmmand in the eastern province of Nangarhar, provincial governor spokesman Ataullah Khogyani said.
Some of the wounded are in a critical condition, Mr Khogyani added.
Preparations for Afghanistan's long-delayed parliamentary vote, scheduled for October 20, have been marred by violence.
Attacks killed five candidates, according to the Independent Election Commission. There are also fears the violence will escalate.
The Taliban and ISIS vowed to disrupt the election, as they step up their attacks across the country.
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