An escaped python killed two children in their sleep in eastern Canada, the Royal Canadian Mounted Police said. The two young boys, aged five and seven, were sleeping in at a friend\'s apartment late Sunday in the small town of Campbellton when they were surprised by the snake. It had escaped from a pet store that specialized in exotic animals located on the ground floor of the building. \"The preliminary investigation has led police to believe that a large exotic snake had escaped its enclosure at the store sometime overnight, and got into the ventilation system, then into the upstairs apartment,\" police said in a statement. \"It\'s believed the two boys were strangled by the snake.\" The python had been recaptured and was being held by police, the statement added.