A display board at Hamburg Central Station shows "Major Disruption." Deutsche Bahn service has been suspended nationwide due to a radio interference problem.Picture Alliance | Picture Alliance | Getty ImagesTrain service across Germany resumed early on Wednesday after a nationwide disruption of the digital railway radio system was fixed, operator Deutsche Bahn said in a statement."Our IT experts have been working non-stop to resolve the issue - and have succeeded," a spokesperson for the company said, adding services were now gradually resuming.Earlier, Deutsche Bahn had stopped all trains, citing an outage affecting the Global System for Mobile Communications for Railways, GSM-R, the main communication tool between train drivers and traffic control centers.Deutsche Bahn said services might still be limited, and that it would issue taxi and hotel vouchers to passengers and offer replacement transport where possible.Deutsche Bahn did not disclose the cause of the incident.