The acting head of US Homeland Security, Kevin McAleenan, has resigned after six months in the post.In a tweet, US President Donald Trump said Mr McAleenan wanted to spend more time with his family. He said his replacement would be named next week, reports BBC.
Mr McAleenan, 48, is the fourth person to serve as the head of Homeland Security during Mr Trump's tenure.
He has overseen the president's tough policies aimed at curbing immigration across the Mexican border.
Announcing his resignation, Mr Trump said Mr McAleenan had done "an outstanding job".