U.S. officials are actively monitoring reports of a possible death from pneumonic plague in Russia, though many details remain unclear. President Donald Trump acknowledged the situation on Monday, stating that the United States is paying close attention and is prepared to assist Russia if needed.

According to several U.S. government sources familiar with internal discussions, a laboratory worker at a Russian institute specializing in plague research reportedly died, prompting quarantines at multiple hospitals in Siberia. The Centers for Disease Control and Prevention (CDC), the State Department, and the Administration for Strategic Preparedness and Response, among other agencies, have been engaged in efforts to gather more information about the incident.

Officials emphasized that the lack of clear intelligence and limited transparency from Russian authorities have complicated efforts to fully understand the circumstances. Some reports indicate that Russian intelligence personnel are involved in managing the situation, further restricting the flow of information.

A U.S. health official described the current risk to the United States as low, noting the geographical distance and the absence of any known cases outside Siberia. “Unless someone gets on a plane and gets to the U.S., it is low risk,” the official said, while urging vigilance without alarm.

Secretary of State Marco Rubio confirmed that Russian officials had shared certain details regarding the infected lab worker and the possibility of additional cases within Russia. “We’re watching and monitoring it closely,” Rubio said, highlighting ongoing diplomatic communications on the matter.

At this stage, U.S. agencies continue to prioritize obtaining accurate intelligence and assessing any potential public health impacts, while maintaining open channels for cooperation with Russian counterparts.