In a tweet, federal police said flights shouldn't be affected by the "robust" police presence at Stuttgart airport. Additional officers were also deployed to other, smaller airports in Baden-Wuerttemberg state — Friedrichshafen, Karlsruhe/Baden-Baden and Mannheim — as a precaution.
SWR reported that two of the suspects, a father and son, were spotted taking pictures at France's Charles de Gaulle airport near Paris last week. Last week, a gunman killed five people in an attack on a Christmas market in the French city of Strasbourg, just across the border from Germany. The suspected gunman, 29-year-old Cherif Chekatt, died in a shootout with police two days after the Dec. 11 attack. Chekatt had been on a French intelligence watch list for radicalism and was convicted 27 times for criminal offenses in France, Germany and Switzerland.
Separately, German authorities said they arrested two men and a woman in southwestern Germany on Wednesday on suspicion of illegal firearms ownership and preparing an attack. Karlsruhe prosecutors said police seized a fully automatic weapon and ammunition in the raid, but that there was no indication of a link to the security alert at the nearby airports.