Navy facility evacuated after discovery of ‘suspicious substance’

The U.S. Navy briefly evacuated a facility in Arlington, Va., Thursday after a “suspicious substance” was found in the mailroom, Navy officials said.

The substance on the suspicious letter tested negative for hazardous material and the building was reopened, the Navy said in a statement.

About 800 people were evacuated from building No. 12 at the Naval Support Facility in Arlington a little before 10:25 a.m. Thursday after the suspicious substance was found.

The Arlington County Hazmat Response Team was brought in and conducted tests on the letter, which came back negative, the Navy said.

The suspicious letter was then turned over to Navy authorities and those who had evacuated were let back into the building.

The suspicious letter at the Naval facility is the latest in a series of mail scares after two letters, one sent to Sen. Roger WickerRoger Frederick WickerLet's hold Facebook to the same standards as other players in the industry Cindy Hyde-Smith sworn in as Mississippi's latest senator Miss. Dem touts campaign poll saying he leads GOP candidates in Senate race MORE (R-Miss.) and the other to President Obama, tested positive for the poison ricin this week. Both were intercepted before reaching the intended destination.

FBI agents arrested Mississippi resident Paul Kevin Curtis Wednesday evening on suspicion of sending the letters to Wicker and Obama.

On Wednesday, the Hart and Russell Senate office buildings were locked down after two suspicious envelopes and a package were found. The tests on those were negative and the buildings were reopened to the public after a little more than an hour.

Also on Wednesday, Sens. Carl LevinCarl Milton LevinSen. Gillibrand, eyeing 2020 bid, rankles some Democrats The Hill's 12:30 Report Congress needs bipartisanship to fully investigate Russian influence MORE (D-Mich.) and Jeff FlakeJeffrey (Jeff) Lane FlakePompeo lacks votes for positive vote on panel Overnight Energy: Senate confirms Bridenstine as NASA chief | Watchdog probes Pruitt’s use of security detail | Emails shine light on EPA science policy changes Arizona GOP tinkers with election rules with an eye on McCain's seat MORE (R-Ariz.) reported receiving suspicious envelopes at their state offices. Those letters also tested negative for any dangerous substances.

The FBI has said there is no connection between the ricin letters and the terrorist bombing at the Boston Marathon on Monday.

— Published at 12:12 p.m. and last updated at 1:28 p.m.