A suicide bomber killed at least 25 people and injured another 30 at a funeral in the eastern Afghan province of Nangarhar.
According to the Times Live, the target of the attack was district governor Hamisha Gul. He was one of the 30 people injured.
His son was killed when he heroically tried to stop the bomber by grabbing him, The Associated Press reports.
The Taliban is known to target government officials at functions like funerals and weddings, but have not yet claimed responsibility for Tuesday's attack.
Recently, villagers staged an uprising against Taliban insurgents, BBC News reports.
Tribal elders and intelligence officials believe this was a revenge attack for the uprising.
Afghani President Hamid Karzai condemned the attack and offered in his condolences, Reuters reports.
A witness told BBC News that "the suicide attacker was walking among the mourners."
"He was recognized by the brother of the district governor of Dur Baba. But as soon as he tried to arrest him, the attacker detonated his suicide vest."
According to The AP, the funeral was held for a ranking elder within the community.
This past Saturday, a twin suicide bomb attack targeting a NATO base in eastern Afghanistan killed 12 people and wounded 50.
The Taliban took responsibility for the attack.
Two US troops were also killed in a separate attack that day.
According to Reuters, suicide attacks and roadside bombs are the #1 killer of Afghan civilians, Afghan soldiers, and foreign soldiers.
A recent report by the UN said that 1,145 civilians had been killed in Afghanistan between January 1 and June 30 this year. 1,954 have been injured. Taliban militants are responsible for 80% of civilian casualties.