The international air traffic control agency Eurocontrol has warned airlines to exercise caution in the eastern Mediterranean due to the possible launch of air strikes into Syria in the next 72 hours.
Eurocontrol said that air-to-ground and/or cruise missiles could be used within that period and there was a possibility of intermittent disruption of radio navigation equipment.
US President Donald Trump and Western allies are discussing possible military action after they blamed Syria's President Bashar al-Assad for a suspected poison gas attack on Saturday on a rebel-held town that long had held out against government forces.
Trump on Tuesday cancelled a planned trip to Latin America later this week to focus instead on responding to the Syria incident, the White House said. Trump had on Monday warned of a quick, forceful response once responsibility for the Syria attack was established.