A suicide bomber killed at least 30 people in a government office in northern Afghanistan Monday, officials said, the spiral of violence across the country, even before an expected spring offensive.
Afghan and NATO-led forces have also investigate the second serious incident involving civilian casualties, most recently as six people were killed in an airstrike mistakenly hit a house came from the eastern province of Nangarhar.
In the province of Kunduz in the north, the central front in a growing Taliban insurgency, a suicide bomber killed at least 30 people, Mohammad Ayoub Haqyar, Emam Saheb district chief, told Reuters. 40 others were injured.
Kunduz police chief Abdul Qayum Ibrahimi said three policemen were among civilians dead and many wounded.
Taliban spokesman, Zabihullah Mujahid, speaking by telephone from an undisclosed location, claimed responsibility for the blast in Kunduz, on behalf of the Islamist group. He said the aim was for people to sign for a group of community policing.
Meanwhile, NATO-led International Security Assistance Force said it was investigating whether its forces killed or injured civilians in an attack against the insurgents seen placing a bomb in the eastern province of Nangarhar on Sunday.
Reuters television pictures of the dead zone two children, a boy and a girl, placed in the fleece-lined coffins. A Reuters journalist reported seeing six bodies outside a house in the district of Nangarhar Khogiani, including four children. Ahmadzia Abdulzai, spokesman for the governor of Nangarhar, said a missile had killed six family members.
"It's an extremely unfortunate incident," spokesman for ISAF U.S. Army Colonel Patrick Hynes said in a statement.
Sunday evening, Afghan President Hamid Karzai strongly condemned the raid in Kunar province, said his office has killed over 50 civilians.
ISAF expressed, however, the issue of taxation in Kunar, but Afghan officials said an investigation began Monday.
Admiral Greg Smith, chief spokesman for ISAF, said the probe would focus on a shoot that began on Thursday night and lasted over five hours.
He said that ISAF had "clear intelligence" that Taliban leaders were planning a meeting this evening and that the surveillance images showed no civilians or permanent establishments in the area.