Recovery teams deployed drones and thermal imaging equipment Thursday across a mountainous area where a China Eastern plane inexplicably crashed with 132 people on board. Four days after flight MU5735 ploughed into rugged terrain near Wuzhou in southern China, officials are still yet to declare all of the 123 passengers and nine crew dead. "We are still combining manual search with mechanics assisted search to enlarge the search area as much as possible to search for trapped people and survivors," says eputy chief of combat training division of Guangxi Fire and Rescue Force Huang Shangwu. IMAGES AND SOUNDBITES