The person is in custody, according to Secret Service officials.
The incident happened not long before officials shut down the White House to investigate another suspicious package.
The call came in around 9:15 a.m. this morning.
Officials have evacuated surrounding buildings “out of an abundance of caution,” according to police.
Police arrived at the scene around 10:20 a.m.
They will be closing down the inner-loop.
Police are investigating a suspicious package in the 900 block of G Street NW.
Secret Service found letter mailed to President Obama laced with “suspicious substance,” more suspicious letters sent to senators, and now a Senate office building is on lockdown.
Police roped off a block of Connecticut Avenue NW just north of Dupont Circle after a bank was robbed and the suspect left behind a suspicious package that authorities are still investigating.
