Taliban militants killed dozens of Afghan security forces in fresh attacks on several government targets, according to officials.
Safiullah Amiri, deputy chairman of the regional council in the northern Kunduz province, told RFE/RL's Radio Free Afghanistan that 15 Afghan military personnel were killed in an attack in the Dashti Archi district that began late on September 9.
Amiri said that another 18 security personnel were injured in the attack.
A security source in Dashti Archi said Taliban militants attacked several security teams in the district.
Meanwhile, in the northern province of Jawzjan, provincial police chief Faqir Mohammad Jawzjani said at least eight police were killed in early-morning fighting with the Taliban in the Khamyab district on September 10, the Associated Press reported.
Jawzjani told the AP that Afghan troops were forced to retreat from a headquarters in the district in order to prevent civilian casualties. He said seven Taliban militants were killed and eight others wounded.
"There was intense fighting and we didn't want civilian houses destroyed, or any civilian casualties," Jawzjani said.
In the northern city of Sar-e-Pul, the capital of the Afghan province of the same name, the Taliban carried out overnight attacks on military and police installations, officials and security sources said.
Provincial council member Asif Sadiqi was quoted by the dpa news agency as saying that at least 17 soldiers were killed in the attacks in Sar-e-Pul, which he said the militants launched from three directions.
Taliban militants reportedly seized control of several military bases and police checkpoints in Sar-e-Pul, and provincial council member Reza Alimzada said that several security personnel were taken hostage.
Meanwhile, Taliban fighters killed another 14 local Afghan security-force members and government-loyal militiamen in the Dara Suf district of the northern Samangan Province, provincial spokesman Sediq Azizi said.
Azizi said that that six others were wounded.