One of Denmark’s largest cellphone networks has suffered severe outages that prevented people from contacting emergency services and forced at least one hospital to reduce non-critical medical care. The network provider, TDC Net, said the problems were likely due to an update carried out in the past 24 hours and it had no reason to believe that disruptions could be due to cyber attacks. It later said operations had returned to normal and the cause of the outage was being investigated. Danish media said trains and buses in parts of the country also suffered delays due to signaling issues. Danish intelligence agencies could not confirm if the two incidents were related.