EDITORS PLEASE NOTE EDIT CONTAINS CONVERTED 4:3 MATERIAL<br/> At least six firefighters died battling a forest fire in southern Chile.<br/> A further four people were treated for burns.<br/> Survivor accounts said several hotspots formed a circle of flames around the firefighters.<br/> Authorities believe the men died after this created a heat tunnel, a phenomenon that can create temperatures up to 2000 degrees celsius.<br/> On firefighter, Hector Herrera managed to escape and recounted the harrowing ordeal.<br/> (SOUNDBITE) HECTOR HERRERA, FIREFIGHTER WHO SURVIVED DEADLY INCIDENT, SAYING(Spanish):<br/> "What I don't know is what happened to the people who were working directly with me. I was able to get out through the area where there wasn't a fire but in the higher part, there were other people and when the smoke covered us-- it covered all of us, in reality, some of them threw themselves on the ground as if to let it pass but it choked us. It choked me; it choked all of us. What I did was run into the fire, that's all. I did get burnt in parts but I saved myself. My feet got burnt, that's all, and then I ran toward the stream where there was water."<br/> The incident began on Wednesday morning, when around 50 small fires are thought to have been deliberately set.<br/> The country's president had harsh words for those responsible.<br/> (SOUNDBITE) CHILEAN PRESIDENT SEBASTIAN PINERA SAYING(Spanish):<br/> "We have decided to press criminal charges, invoking the anti-terrorist law. Because this was definitely arson and criminal conduct that caused these fires to start simultaneously."<br/> So far authorities do not have any leads on suspects.<br/> Several forest fires in Chile's south have burned thousands of acres of land and over 100 homes.<br/> Marie-Claire Fennessy, Reuters
