Report : Investigators suspect communications were manually switched off . Comment: Malaysian military radar shows drastic altitude changes , an official says . A classified analysis calculates the flight crashed into the Indian Ocean , CNN learns .
Report : Investigators suspect communications were manually switched off . More investigators learn , `` the more difficult to write off '' human intervention , official says . Malaysian military radar shows drastic altitude changes , an official says . A classified analysis calculates the flight crashed into the Indian Ocean , CNN learns .