U.S. Secret Service Director Kimberly Cheatle has resigned after facing backlash over the attempted assassination of former President Donald Trump at a campaign event in Pennsylvania.

I take full responsibility for the security lapse, she said in an email to staff Tuesday obtained by The Associated Press . In light of recent events, it is with a heavy heart that I have made the difficult decision to step down as your director.

President Joe Biden thanked Cheatle for her decades of public service in a statement confirming her resignation. He also announced plans to appoint a new director soon.