Three Syrian men suspected of being sent by Islamic State (Isis) have been arrested in Germany.
Police believe the three men, arrested in the northern state of Schleswig-Holstein, were sent by Isis to carry out attacks.
The men were arrested during a raid on refugee homes, following several weeks of observation. Newspaper Die Welt says the raid focused on asylum seekers linked with Isis.
It is reported that they are aged between 17 and 26 years old and were sent over in November 2015.
Prosecutors said the men were sent "either to carry out a mission that they had been informed about or to wait for further instructions". It is unclear when or where the attack would have taken place.
Last week German Interior Minister Thomas de Maiziere told the tabloid newspaper Bild that over 520 Isis terrorists were living in Germany, saying "the terror threat now stems from foreign hit teams as well as fanatical lone wolves in Germany.
"The hit teams are secretly smuggled into Europe and prepare their actions without being noticed, as we saw with the attacks in Paris and Brussels. But it's even more difficult to uncover the fanatical lone wolves. Unfortunately, there is a real and present danger from both threats."