In Afghanistan, at least 14 people were killed and four others injured when a bomb hit a minivan in the western province of Heart on Thursday. Shafiq Perozyan, a spokesman for the province's governor said the blast took place in Kushk-e-Kohna district and the bus was carrying members of the same family including women and children. He said security forces defused two more roadside bombs in the same area, adding that an investigation was under way into the attack. President Hamid Karzai condemned the incident terming it as an act of enemies of Afghanistan. The incident comes only a few days after another roadside bomb explosion had killed 15 passengers in southern province of Helmand. Meanwhile, four Afghan soldiers were killed in a NATO air strike last night after they were mistaken for militants. Afghan Defence Ministry spokesman General Mohammad Zahir Azimi said the soldiers had left their base in Helmand's Musa Qala district when they came under fire from NATO planes. He said NATO told the Afghan government that the coalition thought the men were militants. A NATO spokesman said a team has been sent to investigate the incident.