WASHINGTON, May 20 (Reuters) – Top officials from President Donald Trump’s administration will brief the U.S. Senate and House of Representatives about Iran on Tuesday afternoon, congressional aides said, after lawmakers clamored for more information about tension between the two countries.

The briefers will be Secretary of State Mike Pompeo, Acting Secretary of Defense Patrick Shanahan, Joint Chiefs of Staff Chairman General Joseph Dunford and an unnamed representative of the intelligence community, congressional aides said.

Aides had said last week that a Senate briefing was set for Tuesday, but details of the House meeting had not been made final.

Trump threatened Iran in a tweet on Sunday, raising concerns about a potential U.S.-Iran conflict at a time when tensions between Washington and Tehran have risen.

Concern also rose after a rocket was fired on Sunday into the Iraqi capital Baghdad’s heavily fortified Green Zone, which houses government buildings and diplomatic missions, falling near the U.S. Embassy but causing no casualties.

(Reporting by Patricia Zengerle Editing by Alistair Bell)