BERLIN (AP) — Authorities in western Germany say they have arrested an Iranian man on suspicion of planning an attack with deadly chemicals.

Police and prosecutors said early Sunday that the 32-year-old man and another person were detained in the town of Castrop-Rauxel, northwest of Dortmund.

In a joint statement they said the man is suspected to have planned a serious attack motivated by Islamic extremism, for which he had allegedly obtained cyanide and ricin.