Republican National Committee headquarters under lockdown after being sent vials of blood

SUMMARY

The Republican National Committee (RNC) headquarters in Washington, D.C., was locked down Wednesday morning after receiving vials of blood in a suspicious package, sources told NBC News. A hazardous materials team from the U.S. Capitol Police responded to the incident. Although the package was cleared, the building remained on lockdown while the blood was tested. It is unclear if a suspect has been apprehended. The lockdown follows recent heightened security concerns, including an assault on Trump volunteers in Philadelphia. Fire and EMS vehicles were also seen outside the Rayburn and Cannon House office buildings.