KARLSRUHE, Germany - Germany's justice system is struggling to cope with waves of suspected jihadists returning from Syria and the speed at which young Muslims are being radicalised, the top public prosecutor said on Thursday.Federal Prosecutor General Harald Range said his office was investigating 46 of the most serious cases, involving 83 people suspected of offenses like belonging to Islamic State or al Qaeda. Regional prosecutors were investigating 100 more.That is a huge increase on the five investigations of eight suspects that prosecutors had to deal with in 2013."We are at the limits of our capacity," Range said, adding that waves of new cases were pending and Germany was "in the crosshairs of jihadist terror.""What worries me is the speed with which people are radicalizing, or being radicalized. We are facing a phenomenon which needs a broad strategy of prevention," he said.