At least four Afghan intelligence staff have been killed in a string of suicide bombings at offices of the provincial intelligence department in Wardak.
Five suicide bombers were shot dead in the series of co-ordinated attacks. More than 100 people have been injured.
The governor's office says at least six militants launched the attacks shortly after a powerful car bomb was detonated by a suicide attacker.
Afghan special forces engaged in heavy exchanges of fire, the BBC reports.
Local shopkeepers say the explosions were so powerful they smashed shop fronts and windows 1km away.
Earlier, local officials said a NATO airstrike on Saturday killed 16 people, including eight civilians, in Kunar province.
Police say the strike hit a truck shortly after Arab and Afghan militiamen boarded the vehicle.