New Years Eve - Cologne Cathedral was Attacked

Whilst the mass attack on women by Muslims in Cologne has received a small amount of coverage in the UK media, I can't recall seeing anything about the Cathedral also being attacked. However the 'Frankfurter Allgemeine' reports that firecrackers and rockets were directed at the Cathedral during the New Year's Eve Service and that the German police did nothing.
The report is in German but Google Translate does quite a good job.