Pakistan will shoot down any US drone that intrudes its air space according to new directives, a senior Pakistani official said on Sunday. “Any object entering into our air space, including US drones, will be treated as hostile and be shot down,” a senior Pakistani military official told NBC News.The policy change comes just weeks after a deadly NATO attack on Pakistani military checkpoints killed 24 Pakistani soldiers. Chief of Army Staff General Ashfaq Parvez Kayani had issued multiple directives since the NATO attack, which included orders to shoot down US drones, senior military officials confirmed to NBC News. It was unclear whether orders to fire upon incoming US drones was part of the initial orders.