Party Balloons Cause White House Lockdown

The White House underwent a short-lived lockdown Sunday afternoon.

The culprit: A couple of party balloons.

A U.S. Secret Service representative told CBS News that some party balloons had drifted over the White House complex. A couple balloons landed on the property and prompted a lockdown that lasted a few minutes.

The incident comes just days after authorities shut down the White House when aU.S. Secret Service agent shot an armed man near the executive mansion. The suspect, who had walked up to a White House security checkpoint carrying a pistol, was immediately taken into custody Friday.

President Obama was not at the executive mansion at the time of Sunday's lockdown. He is on a trip to Hanoi, Vietnam.