The US is closely monitoring a case of a lab worker who possibly died of plague in Siberia, according to reports.[8036706][7920518][7964603] Nearly 200 people are under observation in Irkutsk, Russia, after a lab worker died from plague, according to the Moscow Times.[7964603][7920518][8036706] The Russian government has reported several cases of plague in the region, with the US closely monitoring the situation.[8036706][7920518][7964603] According to the Centers for Disease Control and Prevention, the US is taking the situation seriously and is working closely with Russian authorities.[8036706] The lab worker, whose name has not been released, died from the plague after working with infected materials.[7920518][7964603][8036706] The US is urging people to exercise caution when traveling to or from the affected area.[8036706]