Russian forces have “deliberately and intentionally” targeted civilian areas and infrastructure during the most recent days of their incursion in Ukraine, according to a senior U.S. defense official.

Pentagon spokesman John Kirby said on Monday the Department of Defense has seen “clear evidence” that Russian forces had committed war crimes, but he didn’t provide specifics. On Tuesday, the U.S. official added that the Pentagon had seen targeting of “hospitals” and “places of shelter” over the “last week or so.”