Armed clashes broke out in Kadhmiya district in northern Baghdad Sunday after an American force stormed Shiitte cleric Muqtada Al-Sadr's office and arrested some of the people inside. A source at the Iraqi police told KUNA US forces exchanged fire shots with the guards of Al-Sadr's office. He said the guards resisted the American troops. American army vehicles surrounded the office and the forces started shooting at it then stormed it and arrested the people inside, said the source. Locals at Khadmiya and eyewitnesses said the exchange of fire lasted for some an hour. They reported that warnings, through loud speakers of mosques, to the citizens that the American forces were surrounding Al-Sadr's office.