(Reuters) - The Biden administration is moving to tighten enforcement of sanctions against Iran and send a top-level delegation to the United Arab Emirates next week, the Wall Street Journal reported on Thursday, citing senior U.S. officials.

       The delegation, which will include the head of Treasury's Office of Foreign Assets Control, Andrea Gacki, will warn private firms and banks in the UAE that they "face extreme risk" if sanctioned trade continues the newspaper said.

       (Reporting by Jahnavi Nidumolu in Bengaluru; Editing by Andrew Cawthorne)