U.S. President Donald Trump on Tuesday urged Iranians to keep protesting and remember the names of those abusing them, saying help is on the way, as Iran's clerical establishment pressed its crackdown against the biggest demonstrations in years.

"Iranian Patriots, KEEP PROTESTING ¡ª TAKE OVER YOUR INSTITUTIONS!!!... HELP IS ON ITS WAY," Trump said in a post on Truth Social, without saying what that help might be.

He said he had canceled all meetings with Iranian officials until the "senseless killing" of protesters stopped and ?in a later speech told Iranians to "save the name of the killers and the abusers ... because they'll pay a very big price."