An Iranian man has been arrested in western Germany suspected of preparing an attack using cyanide and ricin, police and prosecutors said Sunday. Munster police and the Dusseldorf prosecutors' office said in a press release that officers searched a residence in the town of Castrop-Rauxel for "toxic substances" intended to carry out an attack. The 32-year-old Iranian was "suspected of having prepared a serious act of violence threatening the security of the state by obtaining cyanide and ricin” with a view to committing an attack, said investigators. Another person was arrested during the operation and taken into custody, AFP quoted them as saying. The main suspect will be presented in the coming days to an investigating judge ahead of possible pre-trial detention, they added. According to The Associated Press, German news agency dpa reported that specialists wearing anti-contamination suits carried evidence out of the man's home. Tabloid newspaper Bild reported that German authorities had received a tip from an allied intelligence agency about the alleged plans for a chemical attack.