Just two days after the Secret Service shot an armed man after he approached a checkpoint and refused to drop his gun, the White House went on lockdown again.

JUST IN: White House on lock-down for unspecified reason. — NBC Nightly News (@NBCNightlyNews) May 22, 2016

This time the culprit was a group of party balloons that drifted into a restricted area.

Secret Service: Party balloons drift and land on White House grounds prompting a lock-down. — Stephany Holguin (@StephanyReports) May 22, 2016

White House was in lockdown– thanks to some PARTY BALLOONS that drifted over… a few landed… 🙂 — Michelle Kosinski (@MKosinskiCNN) May 22, 2016

UPDATE: #WhiteHouse given the All Clear sign by security. Apparently some party balloons landed on White House grounds. — John Zuchelli (@tvzuke) May 22, 2016

JUST IN: All clear at White House after several 'party balloons' drift over White House grounds. — NBC Nightly News (@NBCNightlyNews) May 22, 2016

Keep your balloons off the White House lawn, DC! ?? — Dianne Gallagher (@DianneG) May 22, 2016

Maybe Joe was throwing a party?