Malaysia Airlines says it now is fearing the worst for the passengers and crew of its missing plane that disappeared early Saturday.

The Boeing 777 carrying 239 people is presumed to have crashed of the Vietnamese coast after taking off from Kuala Lumpur. Four Americans, including an infant were on the flight. The airline said it has brought in a disaster recovery management team from Atlanta, Georgia to help in the efforts to find the plane.  

Search crews are looking for wreckage in the area of some oil slicks Vietnamese rescue planes spotted in the South China Sea.

U.S. officials are reviewing possible terror links in connection with a missing Malaysian airliner.

Authorities have been reviewing the passenger manifest list and cross-checking names with their international colleagues after Malaysia Airlines Flight MH370 disappeared with 239 on board while flying from Kuala Lumpur to Beijing early Saturday local time.

Currently there is no information as to what has happened to the plane. 

At least two people were using stolen passports on the missing Malaysia Airline flight. 

An Italian and Australian man listed on the plane's manifest are both safe, though each had reported his passport stolen in the past two years. 

The Boeing 777 bound for Beijing from Kuala Lumpur went missing over the South China Sea early Saturday. Four Americans, including a baby, were among the 239 passengers listed.  

Search crews are looking for wreckage off the coast of Vietnam.