Attackers cut cables vital for the rail network in two places causing a near three-hour halt to all rail traffic in northern Germany on Saturday morning, in what authorities called an act of sabotage without identifying who might be responsible. The federal police has launched an investigation into the incident, Transport Minister Volker Wissing told a news conference. “It is clear that this was a targeted and malicious action,” he said. The disruption immediately raised alarm bells afterNATO and the European Union last month stressed the need to protect critical infrastructure after what they…