Calling it a “criminal and terrorist act,” the U.S. Ambassador to Israel has demanded the country “aggressively investigate” the killing of an American citizen who was beaten to death by Israeli settlers while visiting relatives in the occupied West Bank.

Sayfollah Musallet, known as Saif, was “brutally beaten to death” in the town of al-Mazra’a ash-Sharqiya, north of Ramallah on Friday, his family said in a statement on social media and confirmed to NBC News. They said a group of settlers blocked an ambulance from reaching their relative for about three hours and he died before he could get to a hospital.

Mike Huckabee, the American Ambassador to Israel said in a post on X on Tuesday that he had “asked Israel to aggressively investigate the murder” of Musallet who had traveled from his home in Tampa, Florida to visit his mom, brother and sister. “There must be accountability for this criminal and terrorist act,” he added.