A memorial at the National Cathedral in Washington will honour the seven World Central Kitchen aid workers killed by Israeli air strikes in Gaza earlier this month, TRT World reports.

José Andrés, the celebrity chef and philanthropist behind the Washington-based World Central Kitchen disaster relief group, is expected to speak at the celebration of life service, and famed cellist Yo-Yo Ma will perform, organizers said.

The Biden administration have said that Douglas Emhoff, husband of Vice President Kamala Harris, and US Assistant Deputy Secretary of State Kurt Campbell would be among senior administration figures attending.

The aid workers were killed April 1 when a succession of Israeli armed drones ripped through vehicles in their convoy as they left one of World Central Kitchen’s warehouses on a food delivery mission.

Those who died were Palestinian Saifeddin Issam Ayad Abutaha; Britons John Chapman, James Kirby and James Henderson; dual U.S.-Canadian citizen Jacob Flickinger; Australian Lalzawmi Frankcom; and Polish citizen Damiam Sobol.