Three remote Department of Defense mail facilities remained closed Tuesday as officials continued investigating biological detection alerts that prompted precautionary lockdowns yesterday, reports the Washington Post. A sensor at a Department of Defense mailroom in Fairfax County signaled the presence of a suspicious biological substance yesterday.
Just hours before, the mail facility at the Pentagon, about four miles away in Arlington, was evacuated and closed after tests conducted last week came back positive for anthrax, officials said. Later tests at the Pentagon were negative. Officials could not explain why the alarms were activated. Officials initially said the events were unrelated. But last night, a Virginia official said the events might be linked. Defense conducted precautionary decontamination of 42 people last night.