A White House memo set off a flurry of panic across nonprofit groups, who said they were unable to access federal government systems used to withdraw funds.

The Office of Management and Budget on Tuesday morning sent out instructions to agencies for complying with a massive federal funding freeze.

At least 56 senior officials in the top U.S. aid and development agency have been placed on leave amid a probe into an alleged effort to thwart President Trump's orders, reports say.