Cologne ricin plot by Muslim terrorist bigger than initially suspected

German authorities said on Wednesday that they had averted a major biological attack by arresting a Tunisian in Cologne a week ago, with the scale of the plot greater than initially thought.

The 29-year-old man, identified only as Sief Allah H. in accordance with German privacy laws, had manufactured ricin, a poison found in castor beans, for the suspected attack, the president of the Federal Criminal Police Office (BKA), Holger Münch, told German broadcaster RBB-Inforadio.

“There were very concrete preparations for such an act using what you might call a biological bomb,” Münch said, describing it as an “unprecedented” threat.