Washington (CNN) Baltimore Mayor Bernard "Jack" Young said Monday that President Donald Trump should send federal assistance to the city instead of criticizing its conditions in "childish" tweets.

"If he really wants to, he needs to send us the federal assistance -- not only to Baltimore, to cities around this country that are in the same situation that Baltimore is in -- but he's so interested in childish tweets," Young told CNN's John Berman on "New Day."

The comments come two days after Trump attacked Baltimore in a series of tweets , calling the Maryland city a "disgusting, rat and rodent infested mess" and a "very dangerous & filthy place," and saying conditions there are "FAR WORSE and more dangerous" than those at the US-Mexico border. Trump's tweet was part of a wider attack on House Oversight Chairman Rep. Elijah Cummings, an African-American Democrat who represents part of the city.

"I mean, if you want to help us, help us. Don't talk about it, send the resources we need to rebuild America. He's talking about he wants to 'make American great again.' Put the money in the cities that need it the most and that way you can make America great again," said Young, a Democrat.

Young, who became mayor after his predecessor, Catherine Pugh, resigned amid a book deal scandal , said Trump "has never" reached out to him since he took on the position in early May.

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