German police say they are holding a man in connection with a threat to Cologne Cathedral

​German authorities say they have detained a man in connection with a reported threat to Cologne Cathedral over the holiday period. Police searched the cathedral with sniffer dogs just before Christmas, and Christmas Eve worshippers faced security checks to get into midnight Mass there. They didn't specify the threat, but German news agency dpa said authorities were responding to indications of a possible attack by Islamic extremists, without citing a specific source. Cologne police said they took precautions over Christmas.