The U.S.National Transportation Safety Board says it has sent four persons to assist in the fatal Ethiopian Airlines crash.
The U.S.Federal Aviation Administration is also monitoring developments concerning the crash.
A statement from the administration said they are in contact with the State Department and plan to join the National Transportation Safety Board in its assistance with Ethiopian civil aviation authorities to investigate the crash.
An Ethiopian Airlines Boeing 737 passenger jet to Nairobi crashed Sunday with 149 passengers and eight crew members aboard, the airline said earlier.