President Donald Trump on Saturday announced that federal authorities had made  multiple arrests  of people he said were vandalizing the Reflecting Pool as he struggled to explain why the $14-million-plus rehabilitation project he launched for the nation's 250th anniversary seemingly backfired.

Trump said his predecessors had let the pool turn an algae-stained green and that he'd line it with  American flag blue  so it better reflected the Washington Monument. But after the new pool was unveiled, its blue tinge quickly became a familiar green. Workers treated it with chemicals to kill the algae, but then the painted blue lining on the bottom began to peel.

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On Friday night, Trump posted about the pool.

 We've had some real problems with Vandalism at the beautiful Reflecting Pool,  he posted on his social media site Friday night.  Just like three days ago, they destroyed the grass outside of the Pool, they've also done everything possible to hurt the inside surface that was just installed. 

He offered no details to substantiate his claim.

AP Photo/Mark Schiefelbein AP Photo/Mark Schiefelbein

Agencies responsible for law enforcement and upkeep on the National Mall - the U.S. Park Police, National Park Service and Interior Department - did not respond to requests for comment. Trump on Saturday followed up by posting that Park Police  have arrested multiple individuals for vandalizing our Nations magnificent Reflecting Poll,  correcting his spelling to  Pool  later.

He went on:  Who would do such a thing? These are very serious crimes having to do with the destruction of National Monuments. Years in jail! 

Trump later acknowledged in a post that the Reflecting Pool will need to be repaired, yet again, to restore it to  an equal level of Beauty  as before.  We met with contractors today, will probably be forced to release and drain much of the water in order to do the necessary repairs, but will have them done as quickly as possible,  he wrote.

One man arrested was David Hearn, 67, of Bethesda, Maryland, who owned a 

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