At least three Afghan policemen have been killed and two others were wounded after militants attacked a government building in the eastern province of Paktia, Press TV reported.
The attack took place at around 4 p.m. local time (1200 GMT) on Thursday in the Chamkani district of the province, the Associated Press reported.
Three bombers blew themselves up at the entrance of the government building as tribal elders and the district governor were meeting to elect delegates to attend loya jirga, a traditional gathering of community representatives.
The loya jirga, called by President Hamid Karzai and scheduled to be held in the capital Kabul next week, seeks to define a new strategy for peace negotiations with the Taliban and Afghanistan's relationship with the United States.
The explosion started a fierce exchange of fire broke out between Afghan security forces and the militants. Two militants were killed when they tried to storm the compound. Three Afghan police were also killed and two others were wounded in the incident.
Taliban spokesman Zabihullah Mujahid has announced that his men carried out the act of violence.
Insecurity continues to rise across Afghanistan despite the presence of nearly 150,000 US-led forces in the war-battered Asian country.
A United Nations report on Afghanistan issued on September 28 said that the monthly average number of security incidents recorded for the year through the end of August has risen nearly 40 percent.
The report also said civilian casualties, already at record levels in the first six months of the year, rose 5 percent between June and August 2011 compared with the same three-month period in 2010.
Around 130,000 people were displaced by the conflict in the first seven months of the year, up nearly two-thirds from the same period a year earlier.