The United States has urged its citizens to leave Venezuela immediately. This follows reports that armed paramilitary groups, called colectivos, are trying to find US citizens. This comes one week after Venezuela’s president, Nicolás Maduro, was captured. On Saturday, the US State Department issued a security alert. It warned about pro-regime militias setting up roadblocks and searching vehicles for signs of US citizens or their supporters. The alert said, "US citizens in Venezuela should remain vigilant and exercise caution when traveling by road." The department urged Americans to leave now, as some international flights from Venezuela have restarted. Last week, former US President Donald Trump told the New York Times he hopes to visit Venezuela someday. He claimed the US was "running" the country after removing its leaders in a deadly night raid on Caracas. He said, "I think at some point it’ll be safe." But the alert shows how unstable things still are after last weekend’s special forces raid, which killed many people. While many Venezuelan opponents of Maduro cheered his capture by the US, his supporters protested against what they called an imperialist attack. Reporters and activists in Caracas have seen colectivos carrying rifles, riding motorbikes, and setting up checkpoints all over the city. Roads linking Caracas to the western border have dozens of military and police checkpoints. State Department officials visited Caracas on Friday, likely preparing to reopen the US embassy there. Maduro’s successor, acting president Delcy Rodríguez, has called for better relations with Washington despite the recent abduction of her ally.