KABUL (AFP/Reuters) - NATO-led forces opened fired on a civilian vehicle in the Afghan capital Kabul on Thursday, killing a local cleric and sparking demonstrations. Dozens of people protested in front of a military base over the killing by NATOs International Security Assistance Force (ISAF), which said it deeply regretted the death. In an unfortunate incident this morning, an ISAF convoy fired on what appeared to be a threatening vehicle. Regrettably, an Afghan civilian was killed during the incident, the force said in a statement. We later learned that the civilian was Muhammad Yonus, the Imam of Paktia Kowt Mosque in Ud-khil district. He was initially wounded in the incident but later died of his wounds, the statement added. I express my sincere regrets for this loss of life and convey my deepest condolences to his family, said Brig Gen. Eric Tremblay, ISAF spokesman, in the statement. A thorough investigation is being conducted and the family of the cleric will be compensated, ISAF said, without giving further details. Afghanistans Interior Ministry said the man was shot at approximately 8 am (0330 GMT) by a convoy of troops from the NATO-led International Security Assistance Force (ISAF) in Afghanistan. (ISAF) thought he was a suspect, they opened fire and he was wounded, after taking him to hospital he died of his wounds ... after talking to ISAF they said this was mistakenly done, said Zemarai Bashary, spokesman for the interior ministry. The shooting triggered a protest outside Camp Phoenix, one of the largest foreign military bases in Kabul. Earlier this week, a suicide car bomber blew himself up close to Camp Phoenix, wounding eight U.S. soldiers. Meanwhile, a homemade bomb killed a US soldier in southern Afghanistan on Thursday, as Afghan leaders and Western backers met in London to map the future of the troubled nation. NATOs International Security Assistance Force (ISAF) did not give the exact location but much of southern Afghanistan is hard hit by a Taliban-led insurgency launched in late 2001 following their ouster from power. An ISAF service member from the United States was killed today in an IED strike in southern Afghanistan, the force said in a statement, referring to homemade bombs or improvised explosive devices. The latest death took to 41 the number of foreign soldiers killed in Afghanistan since the start of the year. Twenty-six of those have been US nationals, six British and the rest from other nations operating under ISAF, according to a tally by AFP based on the independent website icasualties.org which tracks military casualties in Iraq and Afghanistan. The death comes as Afghan politicians led by President Hamid Karzai and international backers met in a major conference on the future of the country. Karzai said he will reach out to moderate Taliban under a new peace and reconciliation scheme aimed at bringing the rebels in from the cold.