Holger Muench, president of the BKA federal police, told the daily Die Welt he could not discount the threat of militant attacks in Germany as radicals had Western targets in focus, but played down any signs of an imminent attack.
Refugees in Germany fear backlash
"There is a threat level that should be taken seriously, but we have no concrete indications of planning for an attack," he said. "So far, we have no indication that a terrorist has entered Germany as an asylum seeker in order to perpetrate an attack."
Muench said about 10 individual migrants were under investigation as possible terrorists or war criminals, after tip-offs mostly from other refugees.
US states shun Syria refugees in wake of Paris attacks
Coordinated suicide bombings and shootings in Paris on Friday, which killed at least 129 people, have raised concerns that Germany's open-door policy for refugees from Syria may pose a security risk to Europe. Islamic State has claimed responsibility for the attacks.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ