The President of Chile Michelle Bachelet said that thousands of Chilean troops are heading to the country's devastated earthquake zone as reports emerge of desperate survivors turning to looting and arson.President Michelle Bachelet said a total of seven thousand troops would soon be in place in areas around Concepcion. Ms Bachelet said reinforcements would join the troops already in the provinces of Bio Bio and Maule. The Chilean military is attempting to restore order in the country's second city Concepcion amid looting after Saturday's devastating earthquake. One man was shot and killed and about 160 arrested as troops tried to stop the looting of food and other goods during an overnight curfew. The 8.8-magnitude quake has killed 723 so far with 19 people missing. The United Nations has pledged rapid aid but a Chilean plane on an aid mission crashed near Concepcion killing six people.