Arlington County emergency personnel are responding to a reported suspicious package at the National Science Foundation’s headquarters in Ballston.

Hazmat teams have closed off 9th Street N. between N. Stuart and Stafford Streets to respond to the situation. The suspicious package was found in the mailroom of one of NSF’s two buildings, according to scanner traffic.

The Arlington Alert system sent out a message advising motorists and others to avoid the area while the Arlington County Fire and Police departments complete their investigation.

Photo via @Louis3E