The Trump administration plans to slash another $1 billion in federal grants and contracts for health research to Harvard, on top of an existing $2.2 billion cut, the Wall Street Journal reported on Sunday.

Research programs at Harvard University have been warned to brace for "stop work orders" as the slow drip from the Trump administration's $2.2 billion federal funding freeze continues to roll out.

President Trump is set to pull another $1 billion in funding from Harvard. The funding freeze is in addition to the suspension of $2.26 billion in federal funds from the Ivy League university after it refused demands for sweeping policy changes last week.