Police have arrested two suspects who are believed to have planted explosive devices in Bonn central railway station, local media reported on Tuesday. Spiegel Online said two Salafist terrorist suspects identified as Omar D and Abdirazak B have already been arrested. Both are reportedly well-known to authorities as extremists who were detained in 2008 due to a terrorist attempt. On Monday, a bag with no apparent owner was found on a platform of Bonn central railway station, and the authorities shut down the station due to the alarm, causing many delays and cancellations. The station was reopened on Monday evening. The bag\'s contents were described by investigators as \"potentially explosive material,\" although no detonator was found. The police conducted a search across the state of North Rhine-Westphalia on Tuesday.