BERLIN, June 18 (Xinhua) -- Flights were suspended on Sunday in Germany's Stuttgart airport over a false bomb alarm, local media reported.

German media Bild reported an argument between two passengers ended in one accusing the other of having planned an attack on the plane.

The remarks triggered immediate safety procedure by security staff.

The Bulgarian airliner, destined to Varna, was evacuated and thoroughly searched. Luggage were re-screened.

Other flights were also suspended due to the incident.

The threat turned out to be a false alarm, a spokesman for the federal police said.