Update at 12:15 p.m. — The scene has been cleared and employees are being allowed back into the office.
Earlier: Arlington County’s bomb squad is investigating some sort of bomb threat inside an office building in Courthouse.
Initial reports suggest the threat was made to the conservative political advocacy group Americans for Prosperity, at 2111 Wilson Boulevard. Bomb-sniffing dogs from the Arlington County Police Department and Virgina State Police are on the scene. Americans for Prosperity employees have been evacuated, but employees in other offices have been allowed to remain.
Americans for Prosperity (AFP) has been the source of some controversy recently. Among other incidents, the group was accused of sending error-filled ballots to Democrats in Wisconsin during a contentious election this month.
David H. Koch and Charles G. Koch, the original founders of AFP’s predecessor organization, have been major supporters of numerous conservative causes. The New Yorker has reported that Americans for Prosperity provides organizational and financial support to the Tea Party movement.