Story highlights Trump did not explain the nature of what he said was the increased military action

ISIS claimed some responsibility Thursday for the attack

Washington (CNN) President Donald Trump claimed Friday morning that the United States military is hitting ISIS "much harder" after an alleged ISIS-inspired attacker drove a truck down a bike lane in New York, killing eight, though he didn't provide any evidence.

Trump, in a series of tweets ahead of his five-country, 12-day trip to Asia, labeled the accused attacker, 29-year-old Uzbek national Sayfullo Habibullaevic Saipov, a "Degenerate Animal."

"ISIS just claimed the Degenerate Animal who killed, and so badly wounded, the wonderful people on the West Side, was 'their soldier,'" Trump wrote on Twitter. "Based on that, the Military has hit ISIS 'much harder' over the last two days. They will pay a big price for every attack on us!"

Trump did not explain the nature of what he said was the increased military action.

He doubled down on those comments while speaking to reporters at the White House Friday morning, saying his administration will hit ISIS "10 times harder" every time ISIS attacks the United States. He said the military action "took place yesterday" but did not provide further explanation.

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