Renegade soldiers in Mali have looted the presidential palace in the capital, Bamako, after a coup.The coup leaders have called for calm and said all borders are closed after announcing that they have seized control of the country on state TV.A government official told the BBC that President Amadou Toumani Toure is safe and not in the custody of mutineers.The African Union said the "act of rebellion" was a "significant setback for Mali".Kenya's Foreign Minister Moses Wetangula and his delegation are stranded in the country, as Bamako's airport is closed, after attending an AU meeting on peace and security.The West African regional body Ecowas said the mutinous soldiers' behaviour was "reprehensible" and "misguided".The soldiers, calling themselves the Committee for the Re-establishment of Democracy and the Restoration of the State (CNRDR), said they would hand over power to an elected government."The objective of the CNRDR does not in any way aim to confiscate power, and we solemnly swear to return power to a democratically elected president as soon as national unity and territorial integrity are established," they said in a statement.The soldiers said they had led Wednesday's mutiny because the government had not giving them enough arms to tackle a rebellion by ethnic Tuareg in the north of Mali.They attacked the presidential palace, traded gunfire with soldiers loyal to the government and took over the state radio and TV broadcaster in Bamako and took it off air.After several hours of footage of traditional Malian music and dancing, a group of soldiers appeared on screen early on Thursday morning.The leader of the mutiny was revealed to be Capt Amadou Sanogo, who appeared briefly to announce the imposition of a national curfew, although he did not specifying the time and said the constitution had been suspended.