( CNN ) -- At least 12 people were killed and dozens were injured Wednesday in separate attacks in Afghanistan , including an insurgent assault near a post for coalition and Afghan forces , local authorities said . In the eastern Afghan city of Ghazni , insurgents killed at least six civilians and two Afghan troops -- and injured 57 other people -- in an attack near a Provincial Reconstruction Team compound Wednesday afternoon , the provincial governor , Mosa Khan Akbarzada , said . The Taliban claims responsibility for the attack , Taliban spokesman Zabihullah Mujahid said . The assault began when a suicide bomber detonated his car near the PRT compound , according to Akbarzada . Then six attackers opened fire on Afghan troops , he said . Most of the casualties were women and children , according to Akbarzada . The NATO-led International Security Assistance Force confirmed the attack involved a a suicide vehicle bomb , indirect fire and small arms fire . It declined to say whether its personnel were injured . Earlier Wednesday , in a suicide car bomber killed four people and injured 15 more in southern Afghanistan 's Helmand province , a government official said . The attacker rammed his car , laden with explosives , into a military convoy in Lashkargah , Helmand province spokesman Omar Zwak said . He believes the bomber was targeting foreign soldiers , but all who died were civilians , he said . CNN is seeking comment from the ISAF on possible coalition casualties . There has been no claim of responsibility for the Helmand attack . Roadside blasts in Helmand province , which is in southern Afghanistan , killed eight people earlier this month . Wednesday 's attacks came a day after Taliban fighters opened fire on coalition fuel trucks in southwest Afghanistan , killing six drivers and injuring 10 other people , according to a local official . At least 40 of the ISAF vehicles burned in the attack in Farah province , said provincial government spokesman Abdullrahman Zhwandai . The Taliban claimed responsibility for the Farah attack . Civilian casualties in Afghanistan increased 23 % in the first six months of this year , the United Nations said in a report released at the end of July . The increase in deaths and injuries so far this year was mainly driven by the stepped-up use of improvised explosive devices , the U.N. Assistance Mission in Afghanistan said in its report . CNN 's Marilia Brocchetto contributed to this report .
Taliban claimed responsibility for attack that killed at least 8 people in Ghazni . 4 killed when car laden with explosives rams a military convoy in Helmand province . Civilian deaths in Afghanistan have surged due to improvised explosive devices , U.N. reports . Gunmen ambushed a convoy of military trucks , killing 6 drivers in Kabul province on Tuesday .