Israel said Thursday that it “deeply regrets” a deadly strike on Gaza’s only Catholic church that killed three people.

The office of Israel’s Prime Minister Benjamin Netanyahu said that “Israel deeply regrets that a stray ammunition hit Gaza’s Holy Family Church. Every innocent life lost is a tragedy.”

“Israel is investigating the incident and remains committed to protecting civilians and holy sites,” the Prime Minister’s Office added in a statement.

Netanyahu also told US President Donald Trump that the church incident was a “mistake” in a phone call, White House press secretary Karoline Leavitt told the press at a briefing Thursday. Asked about Trump’s view on the strike, Leavitt described it as “not a positive reaction” and said Netanyahu had conceded the direct hit on the church was a “mistake.”

“He called Prime Minister Netanyahu this morning to address the strikes on that church in Gaza,” Leavitt said.