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 was 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.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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Doraiah Chowdary Vundavally is a Software engineer at VTech . He is the news editor of SocialNews.XYZ and Freelance writer-contributes Telugu and English Columns on Films, Politics, and Gossips. He is the primary contributor for South Cinema Section of SocialNews.XYZ. His mission is to help to develop SocialNews.XYZ into a News website that has no bias or judgement towards any.