WASHINGTON (Reuters) – U.S. President Donald Trump on Wednesday warned Iran and its proxies against attacking U.S. troops or assets in Iraq, citing a possible “sneak attack” but giving no other details.

“Upon information and belief, Iran or its proxies are planning a sneak attack on U.S. troops and/or assets in Iraq. If this happens, Iran will pay a very heavy price, indeed!” Trump said in a post on Twitter.

(Reporting by Susan Heavey; Editing by Chris Reese; Editing by Chris Reese)