BERLIN — German authorities are investigating two men of Tunisian origin suspected of planning to use model airplanes for terrorist attacks, prosecutors said Tuesday, as police in Germany and Belgium raided a series of sites searching for evidence of "possible attack plans and preparations."
No one was arrested in Tuesday's raids, which were carried out by about 90 police in the Stuttgart and Munich areas of southern Germany and in Saxony in eastern Germany, federal prosecutors said in a statement. One site in Belgium was raided, German officials said without elaborating.
Prosecutors said the investigation involved possible charges of "preparation of a serious, state-threatening act of violence," but they did not mention membership in any specific terrorist organization.
The two Tunisians are suspected of "procuring information and objects to commit Islamic extremist explosive attacks with remote-controlled model airplanes," prosecutors added. They gave no further information on the two men and didn't identify them.
However, the public broadcaster in southwestern Germany, SWF, quoted unnamed sources as saying that the two were studying aeronautics at the University of Stuttgart and were suspected of trying to develop techniques for remotely piloting model planes using GPS technology.
German authorities would not say whether the alleged plot was far advanced, but the German news agency dpa, quoting unnamed security sources, said the suspects had been under surveillance for more than a year.
The agency said authorities had recently detected "an increased interest in explosives and model aircraft."
However, authorities added that the national terror threat had not been raised, suggesting police believe the alleged plan — if there were one — was in early stages.