US Secretary of Homeland Security Kristi Noem is expected to arrive in Israel on Sunday to attend a memorial service for the victims of last week’s shooting attack on two Israeli embassy staffers in Washington, DC.

Noem will participate in Monday morning’s ceremony alongside Foreign Minister Gideon Sa’ar in honor of the murdered embassy employees, Yaron Lischinsky and Sarah Lynn Milgrim, after which a tree will be planted in the young couple’s memory, according to a statement from the Foreign Ministry.

Sa’ar and Noem will also meet privately, before delivering joint statements together with US Ambassador to Israel Mike Huckabee, the ministry said.

Lischinsky and Milgrim were killed Wednesday night while leaving an event at the Capital Jewish Museum, when a gunman approached the two and fired a handgun. The suspect shouted, “Free Palestine” as he was being arrested. He has since been charged with two counts of first degree murder.

The two victims were employees at the Israeli embassy in Washington.

Noem, the former governor of North Dakota and staunch ally of US President Donald Trump, said following Wednesday’s shooting that Lischinsky and Milgrim were “senselessly killed,” and vowed that the US “will bring this depraved perpetrator to justice.”

Monday’s memorial service for the two victims will be held at the Foreign Ministry building in Jerusalem starting at 8:30 a.m.

Lischinsky’s funeral was held Sunday evening in Moshav Beit Zayit, near Jerusalem, and was closed to the press at the family’s request.

Milgrim’s funeral will be held on Tuesday at Congregation Beth Torah in Overland Park, Kansas, according to her family.