Four members of the Islamist militant group Hamas have been detained on suspicion of planning attacks on Jewish institutions in Europe, German prosecutors said in a statement on Thursday.
Three of the suspects were detained in Berlin and another was detained in the Netherlands, according to the prosecutors.
"Following the terrible attacks by Hamas on the Israeli population, attacks on Jews in Jewish institutions have also increased in our country in recent weeks," said German Justice Minister Marco Buschmann in a statement on the detentions.
"We must therefore do everything we can to ensure that Jews in our country do not have to fear for their safety again," he said.
European authorities have warned of an increased risk of attacks by Islamists radicalized by the Israel-Hamas war.
(Reporting by Petra Haverkamp, writing by Miranda Murray and Kirsti Knolle, editing by Rachel More)