A 28-year-old laboratory worker in Russia's Irkutsk region died after an incident at a laboratory reportedly involving a broken test tube containing plague bacteria. Initial reports said that about 200 people who had been in contact with her were placed under medical supervision or quarantine. Local authorities later said the worker had not died of plague. The governor of Irkutsk said an autopsy found no traces of the disease. The cause of her death is not stated in the reports.