Suspected extremists arrested in Germany; had traveled via Greece

Three Syrian men believed to have been sent to Germany last year by the Islamic State group were arrested in raids on Tuesday, part of efforts to root out extremists sent to Europe amid the migrant influx, authorities said.

The three are accused of coming to Germany in mid-November at the behest of ISIS "in order either to carry out an assignment they had already received or to keep themselves ready for further instructions," federal prosecutors said. They are suspected of membership in a foreign terrorist organization.

The men were arrested in Schleswig-Holstein, Germany's northernmost state, and their apartments searched, prosecutors added. They were identified only as Mahir Al-H., 17, Mohamed A., 26, and Ibrahim M., 18, in keeping with German privacy rules.

The three traveled to Germany via Turkey and Greece, the route used by most migrants to Europe...