Dresden boosts security after mosque attack

German police are stepping up protection of Muslim institutions in Dresden after two improvised bombs exploded in the eastern city on Monday evening, one at a mosque and one at an international conference center.

No one was hurt by the blasts although the imam of the mosque was inside the building with his wife and sons.

"Even if we so far have no claim of responsibility, we must go on the basis that the motive was xenophobic," Horst Kretzschmar, president of Dresden police, said in a statement.