Hollywood star George Clooney on Thursday urged the international community to “step up” as he unveiled a report alleging links between global corporations, tycoons and governments and rampant corruption in South Sudan which has extracted billions of dollars in profits. Clooney called on the United States and European Union to target those involved and their networks with new and tougher sanctions as his Africa-focused investigative project The Sentry released its latest findings on webs of corruption in the country. “I believe they should do much more,” he told a news conference in London with his prominent human rights lawyer wife Amal Clooney seated in the front row. “I don’t know if they can stop it but they can sure make it a lot harder,” said Clooney, a longtime campaigner for human rights in the region, best known for his advocacy in Sudan’s western region of Darfur. The actor and activist co-founded The Sentry in 2015 with former US official John Prendergast.