German and Austrian investigators have arrested an Iraqi man on suspicion he sabotaged trains in Germany last year, prosecutors said Wednesday.The 42-year-old man was arrested on Monday in Vienna on suspicion that he and others strung a steel rope across the tracks running between the southern German cities of Munich and Nuremberg, damaging the front window of a high speed ICE train in October last year. In another case in December last year, cement blocks were put on the tracks. Islamic State (IS) flags and writings in Arabic were found near the crime scenes, Vienna prosecutors said. According to authorities, the suspect lives in Vienna, reported Spiegel. Bavarian and Berlin investigators are currently in Vienna to participate in the interrogation and support Austrian investigators. The probe is continuing.