Almost a full day after Malaysian Airlines flight MH370 vanished from the radar en route from Kuala Lumpur to Beijing, officials and aviation experts are at a loss to explain the aircraft's fate.
A six-country search off the Vietnamese coast for the missing Boeing 777-200ER, the 227 passengers and 12 crew on-board yielded nothing so far aside from sighting of an oil slick, which officials in the Malaysian capital confirmed on Sunday.
(Read more: Oil slick hints Malaysian jet may have crashed at sea)
IBM, Freescale Semiconductor employees on flight
Late Saturday, details of individuals on the flight began to emerge, including several tech sector professionals. Freescale Semiconductor said in a statement that 20 of its employees were confirmed passengers. Twelve are from Malaysia and eight are from China.
Meanwhile, a North Texan is one of three Americans aboard the Malaysian jetliner. The family of the missing IBM employee told NBC 5 they received word from the American Embassy that he was on the plane.
Boeing to provide technical assistance
Boeing earlier said it has assembled a technical assistance team to help in the investigations, the aircraft manufacturer said via Twitter.
The search for the missing passenger jet will go on "round the clock," Royal Malaysian Air Force Operations & Exercise Director Brigadier General Affendi Buang told reporters on Saturday.
Still, no wreckage from MH370 has yet been recovered, and the probable cause of the aircraft's disappearance is far from being determined. It's "too early to make any conclusive remarks," Malaysian Prime Minister Najib Razak said on Saturday, and authorities are "investigating all possibilities."
Rumors of the plane landing safely in China—later found to be erroneous—and rumors of a hijack or terrorist bombing have only compounded the agony of families and relatives of the passengers on MH370. Reuters reported at least two people on board may have been carrying stolen passports.
(Read more at NBCNews.com: Stolen passports trigger terror concerns)
"Families are struggling for answers and no one can give them any," wrote Stephen Forshaw, former vice-president of Public Affairs at Singapore Airlines (SIA) said in an entry on his Facebook page on Saturday. "It could be a long time before the answers are all found."
Forshaw added: "We have to prepare for the worst possible news, hope and pray for survivors, support those whose loved ones are affected, and above all, be patient and put our faith in those who have the most difficult and grim task of finding and investigating this tragedy."