Western air strikes sparked fresh controversy in Afghanistan on Wednesday as NATO said a bombing killed eight civilians and the US military estimated that up to 30 villagers died in an attack this month. The announcements came after Afghan President Hamid Karzai demanded an end to air strikes by foreign forces helping his government fight a Taliban insurgency, because of the growing and increasingly controversial civilian death toll. NATO soldiers on patrol in the southern province of Helmand on Tuesday came under attack from about 25 insurgents, the alliance's International Security Assistance Force (ISAF) said. A plane dropped a bomb. "Tragically, it is believed that eight civilians were killed as a result of the air strike," it said.