The Council on American-Islamic Relations (CAIR) is calling on the United Nations to investigate the “massacre” of 15 emergency workers in Gaza, including eight paramedics and a UN staff member, Al Jazeera reports.

“The Israeli government must be prevented from committing further atrocities and must be held accountable for the war crimes it has committed with impunity,” CAIR Deputy Executive Director Edward Ahmed Mitchell said in a statement.

“The United States and the nations of the world cannot allow this crime against humanity to continue.”

The bodies of the emergency workers were found buried alongside their ambulances, a week after they went missing under heavy Israeli gunfire.