The top Federal Reserve official charged with financial regulation said on Friday that he would resign, just a week after the new administration of President Donald Trump said it would undertake a review of what it sees as onerous bank rules.

Daniel Tarullo, who had served at the Fed since 2009 and helped shape its response to the 2008-2009 financial crisis, said in a letter to Trump on Friday he would leave the central bank "on or around April 5."

The new administration has already said it would appoint a new Fed governor charged with heading financial regulation, a post in which Tarullo was never formally confirmed. That person has not yet been named.

Breaking News: U.S. Fed governor Daniel Tarullo announces resignation, creating opening at central bank