Police in northern Germany have arrested two suspected supporters of the so-called Islamic State terrorist group in Hamburg and the northern German state of Schleswig Holstein. The investigating judge at the Federal Court of Justice in the south-western city of Karlsruhe authorized the arrest warrants, the Federal Prosecutor’s Office said on Friday. They accuse the two Russian nationals of being members of a criminal organization that collected money for Islamic State in Germany and other European countries. The men, who are being held in custody, are said to have joined the criminal group abo…