A North Texas native living in Asia, 50-year-old Philip Wood, was among the more than 200 people on board Malaysian Airlines flight 370.
About an hour after takeoff Saturday from Malaysia's capital, air traffic controllers lost communication with the plane that was destined for Beijing.
Three Americans were on board, along with 20 international employees of Austin-based tech company Freescale Semiconductor.
"At present, we are solely focused on our employees and their families. Our thoughts and prayers are with those affected by this tragic event," the company's president said in a statement.
The U.S. Navy has joined several other nations in the search to find any sign of the plane, which airline officials say passed a safety inspection just 10 days ago.
"Air Force and Navy of all these countries involved -- it's not that nothing has been done, everyone has put in an effort, and yet we have not found any wreckage. No wreckage whatsoever," said Iganatius Ong, a Malaysia Airlines representative.
No connection has been confirmed thus far, but two large oil slicks were spotted Saturday off the southern tip of Vietnam.
To add to the mystery, authorities have located two people, alive and well, who were listed as passengers, but were later found not to have boarded the plane at all. One is from Austria. The other is from Italy.
Both say their passports were stolen.