Police in the northern German city of Bremen swooped down on Islamists Friday night in the wake of reports of a planned terrorist attack at a soccer game on Sunday.
Security also has been heightened for Jews in the city.
“The Bremen police department has increased its presence in the city and stepped up protective measures in public areas,” said a Bremen police spokesman.
At least one suspect was arrested and several others were detained for questioning. Police also searched an Islamic cultural center.
Heavily armed police were deployed at public markets and at Jewish institutions.
Fears of Islamic terror in Germany have increase recently, and police canceled a carnival parade in a northern city two weeks ago.
The Muslim population in Bremen has soared to nearly 10 percent, and the city has recognized Islam as an official religion, prompting initiatives by some Muslim groups to demand Sharia law superiority.
The port city of Bremen was an important point of transit for Jews in the late 19th and early 20th centuries in their emigration from eastern Europe to the United States. After the Holocaust, few Jews remained, but Soviet immigration later boosted the size of the Jewish population to well over 1,000.
