A major newspaper in Spain has published an exclusive claiming that sources within the search effort to find missing Malaysia Airlines Flight 370 are considering the possibility that the plane was shot down by military forces in order to prevent a terror attack and the government giving the order has yet to divulge its involvement.
There are three possible explanations for the disappearance of Malaysia flight MH370:
1: it crashed somewhere and has yet and may never be found
2: it was hijacked and flown to some undisclosed location for some future act (not ransom but perhaps to be used as a weapon)
3: it was shot down already prior to a terrorist attempt to fly it into some sensitive location (the palace in Thailand, for example)
As the Spanish article suggests, at this point no country would admit such an action – and it could be anyone from the Chinese themselves (vocally bashing Malaysia as a cover up) to the Thais or even a U.S. warship or interceptor.