Did the U.S. Park Police arrest "antifa operatives" for dumping algae into the Reflecting Pool on the National Mall in Washington, D.C.? No, that's not true: The story originated on a Facebook page known for posting satirical content that carries the disclaimer, "Nothing on this page is real," and the image accompanying the claim is stamped with the same warning. In addition, Lead Stories found no matching reports from any credible news outlets.
The claim appeared in a post and image (archived here) by Veteran Up on Facebook on June 17, 2026. It read:
BREAKING: The US Parks [sic] Police [USPP] have apprehended two Antifa operatives caught on camera dumping buckets full of algae into the Reflecting Pool.
The incident happened at about 3 AM on Sunday night [sic]. Cameras caught a pickup truck entering the National Mall carrying the two men and about half a dozen buckets of what environmental experts are calling an extremely aggressive form of Georgia algae.
'As of now they're not cooperating,' said USPP Captain Joseph Barron, 'But we have them on film. Justice will be served.'
Barron believes he can get the suspects to tell them who funded the operation and what they have planned next.
'It's that or ten years in prison. They've caused millions in damage.'
This is what the post looked like on Facebook at the time of writing:

(Image source: post by Veteran Up on Facebook.)
The fake story originated in a June 16, 2026, post (archived here) on the America's Last Line Of Defense (ALLOD) page (archived here), which is run by Christopher Blair, a self-described liberal who has a documented history of publishing satirical or fabricated content. The page's description states: "Nothing on this page is real":

(Image source: America's Last Line of Defense on Facebook.)
The image was also stamped with a disclaimer that read, "Nothing on this page is real." The label is circled in red below:

(Image source: post by Veteran Up on Facebook.)
Lead Stories searched Google News (archived here) and Yahoo News (archived here) and did not find any matching reports from credible news outlets using the search terms: "U.S. Park Police arrested antifa operatives for dumping algae into the Reflecting Pool." If such arrests had been made, major news organizations would have reported it.