CBS News' Seth Doane reports anger boiled over Wednesday morning as the Malaysian authorities prepared for their briefing.
Two Chinese relatives of passengers held up a banner saying "Truth" in Chinese and started shouting before security personnel escorted them out.
"I want you to help me to find my son!" one of the two women said.
Hishammuddin Hussein announced that a delegation of Malaysian government officials, diplomats, air force and civil aviation officials will head to Beijing - where many of the passengers' relatives are gathered - to give briefings to the next of kin on the status of the search.
A source with knowledge of the investigation tells CBS News correspondent Jeff Pegues that there is a small group of American investigators painstakingly working to refine the data gathered from the Malaysians. The NTSB has a small team of three in Kuala Lumpur while the FAA has two investigators there coordinating with the Malaysian investigators.