The US Centers for Disease Control and Prevention says it is aware of a plague case reported in Russia. The agency says it is keeping close watch on the situation. The comment came shortly after the Trump administration disclosed that it, too, was monitoring the incident closely. Plague turns up occasionally in parts of Russia, where scattered cases are recorded in some years. US officials have given no details about the patient or any wider risk. The CDC's public acknowledgment shows the case is being tracked at senior levels of the agency. For now the response stays at the monitoring stage, with no new warnings put out to the public.