Lufthansa flight LH1644 had been circling above the Polish town of Gdansk for about 90 minutes for "unknown reason", Flightradar24's Twitter reports. The aircraft is an Embraer ERJ-195 en route to Gdansk from Munich, Germany.
Michal Dargacz, the Gdansk airport spokesman, told Polish TVN24 channel that due to low visibility in Gdansk Lufthansa decided to divert the airplane to Warsaw
At 6 PM local time (4 PM GMT) it landed safely at Warsaw's Chopin airport.
Commenting on what they called the airplane's strange behavior, Twitter users noted that Lufthansa "blows on cold water" following the deadly crash of another German passenger jet.
As the Embraer was circling above Gdansk, two other airlines' planes safely landed there.