<p>Ash clouds were spreading over the capital city of Buenos Aires, officials said.<br />The Buenos Aires metropolitan airport halted its operation, while airline companies Aerolineas Argentinas, Austral and LAN Argentina have cancelled all flights "until further notice" for safety reasons.<br /><br />LAN Argentina told Xinhua 14 of its flights were cancelled Tuesday.<br />The Puyehue volcano - about 2,240 metres high - is located in the Andes mountains in southern Chile. Its last major eruption was in 1960, following a magnitude-9.5 earthquake.</p>
<p>Ash clouds were spreading over the capital city of Buenos Aires, officials said.<br />The Buenos Aires metropolitan airport halted its operation, while airline companies Aerolineas Argentinas, Austral and LAN Argentina have cancelled all flights "until further notice" for safety reasons.<br /><br />LAN Argentina told Xinhua 14 of its flights were cancelled Tuesday.<br />The Puyehue volcano - about 2,240 metres high - is located in the Andes mountains in southern Chile. Its last major eruption was in 1960, following a magnitude-9.5 earthquake.</p>