President Nicolas Maduro plans to limit the US diplomatic presence in Venezuela and require American tourists to obtain visas, in a sign of growing tensions between the two countries. Maduro has intensified in recent months his allegations of coup and assassination plans -- often purportedly backed by the United States -- as he faces a deep economic crisis and a sharp drop in popularity. "In order to protect our country... I have decided to implement a system of compulsory visas for all Americans entering Venezuela," he told supporters. Under the new measures, Venezuela will start charging tourists the same visa fees the United States asks of Venezuelans, though it was unclear when the plan would be implemented.