On Wednesday, the militants launched an attack on the interior ministry in Kabul, demonstrating their ability to carry out strikes in the capital. Interior Ministry spokesman Najib Danish says one policeman was killed and another five were wounded.
Majority were said to be civilians and included five women, two children, and three police officers.
Gunmen dressed as USA soldiers set off a auto bomb and then tried to shoot their way into the Afghan Interior Ministry before being killed by government forces Wednesday, security officials said.
A police official and two policemen were killed in a suicide bombing in central Logar province on Wednesday morning, local officials confirmed.
A week before that, 60 people were killed and more than 100 wounded when a suicide bomber blew himself up outside a voter registration center in the city.
Three attackers, wearing military uniforms, detonated explosives while the others were shot by government troops, officials said.
"It was 5 in the morning when the Taliban exploded a vehicle bomb near the First District Police Headquarters and three suicide attackers entered the building", Mr. Ahmadzai said.More news: Mega Man 11 Hits PC And Consoles This October
Two blasts went off outside the ministry compound before assailants attempted to storm the building, triggering fierce clashes with security forces that lasted for hours.
After pushing out fighters in Farah, Afghan and U.S. forces continued to pursue them, Nicholson told reporters at the Pentagon via video link.
The use of captured United States uniforms is a long-standing tactic of militant groups in nations like Afghanistan, where long-term United States military presence means a lot of such gear is available. Both groups have also expanded their footprint in the countryside. The attackers did not manage to enter the main compound.
Afghan officials have said recently that their forces were battling militants in at least half of the country's 34 provinces and that at least seven provincial capitals were under threat.
Elsewhere in Afghanistan, the Taliban attacked a district headquarters in the northern Takhar province, killing five security forces, according to provincial police spokesman Khalil Asir.
He said the attackers set off a suicide vehicle bomb at the entrance to the station before three suicide bombers tried to enter. The Taliban claimed responsibility for the attack. No one immediately claimed the attack.
In a statement Wednesday, the USA command in Afghanistan said the strikes against those behind a recent attack in the Helmand provincial capital of Farah resulted in "more than 50 casualties".