A U.S. Postal Inspection Service in Washington D.C. is reporting that at least one suspicious package has ignited. There were no details on any injuries, and the building has been evacuated. The package was addressed to Homeland Security Secretary Janet Napolitano. The Postal Inspection Service is “working aggressively to determine whether the situation is related or involved to anything else that we’ve been working on in the last two days,” said a spokesman. On Thursday, two packages with incendiary devices—one sent to Maryland Governor Martin O’Malley—injured two employees. These two packages were similar to the device found at the Washington post office, according to a senior postal inspector.