Malaysian Authorities say they're trying to narrow their search for missing flight MH-370.

Sources close to the investigation say the latest theory is that the flight crashed into the Southern Indian Ocean, after pilots were overcome by smoke.

But authorities say they're still operating a search and rescue mission.

There were angry scenes at a press conference in Kuala Lumpur where family members of the 239 people on board were thrown out of the chamber.

Transport Minister Hishamuddin Hussein says they're sending a team to Beijing to keep families abreast of the situation;