Farah province Governor Muhaidin Baluch said on Tuesday that the Taliban had kidnapped 11 Pakistani construction workers from the province on Sunday night. Talking to the Associated Press, he said Afghan elders were in negotiations with the kidnappers and had secured the release of seven labourers. The other four remain captive, he added. Also in Farah, a suicide car bomber detonated his explosives next to a NATO convoy on Tuesday and wounded one soldier, a spokeswoman for the alliance said. The attack also caused some damage to the NATO vehicle, said Major Richelle Dowdell of NATOÂ’s International Security Assistance Force. She said the incident was being investigated. Baluch said the attacker was a 22-year-old man. He did not say how he had obtained that information. Last year the Taliban launched more than 140 suicide missions - the highest number since they were ousted from power by the United States-led invasion of 2001. Insurgency-related violence in 2007 killed a record 6,500 people, most of them militants, according to a tally of figures from Afghan and Western officials.