German police say 2 people detained in Bremen anti-terror raid have been released

Police guard the entrance of a synagogue in Bremen, Germany, Sunday March 1, 2015. Police in the German city of Bremen warned Saturday of a potential danger from Islamic extremists there and stepped up security measures. Police said they stepped up their presence in the city and, as a precaution, increased security for the Jewish community. They said Saturday evening, several hours after issuing the warning, that they had carried out searches on an unidentified suspect and at an Islamic culture center. One person was arrested, they added. (AP Photo/dpa,Carmen Jaspersen) (The Associated Press)

In this Saturday Feb. 28, 2015 picture, police vehicles block the road during a search operation at an Islamic culture center in Bremen, Germany, Police in the German city of Bremen warned Saturday of a potential danger from Islamic extremists there and stepped up security measures. Police said they stepped up their presence in the city and, as a precaution, increased security for the Jewish community. They said Saturday evening, several hours after issuing the warning, that they had carried out searches on an unidentified suspect and at an Islamic culture center. One person was arrested, they added. (AP Photo/dpa, Carmen Jaspersen) (The Associated Press)

In this Saturday Feb. 28, 2015 picture police officers walk past an Islamic culture center in Bremen, Germany. Police in the German city of Bremen warned Saturday of a potential danger from Islamic extremists there and stepped up security measures. Police said they stepped up their presence in the city and, as a precaution, increased security for the Jewish community. They said Saturday evening, several hours after issuing the warning, that they had carried out searches on an unidentified suspect and at an Islamic culture center. One person was arrested, they added. Words in Arabic read Islamic Culture Center Bremen. (AP Photo/dpa, Carmen Jaspersen) (The Associated Press)