(CNN) -- An Ethiopian airliner with 92 people on board disappeared from radar and is believed to have crashed shortly after takeoff from Beirut, Lebanon, early Monday, Lebanon's National News Agency reported.

The Boeing aircraft was en route to Addis Ababa, Ethiopia, when it disappeared from radar 30 minutes after takeoff from Rafik Hariri International Airport in Beirut, NNA reported. The plane is believed to have been over water at the time of its disappearance, the news agency said.

STORY HIGHLIGHTS

• Plane disappeared 30 minutes after takeoff, Lebanese news agency says
• Aircraft, carrying 92 people, was bound for Addis Ababa, Ethiopia
• News agency: Plane believed to have been over water at the time of disappearance