
People and health workers unearth bodies found at Nasser Hospital in Khan Yunis in the southern Gaza Strip on April 23, 2024. AFP
"This is something that forces us to call for an independent investigation of all the suspicions and all the circumstances, because indeed it creates the impression that there might have been violations of international human rights committed," EU spokesman Peter Stano said.
"That's why it's important to have independent investigation and to ensure accountability."
The White House also said that it wanted "answers" from Israeli authorities after the discovery of mass graves.
"We want answers," US National Security Advisor Jake Sullivan told reporters.
"We want to see this thoroughly and transparently investigated."
The UN rights office said Tuesday international investigators should be involved in a probe into the discovery of the bodies.
The UN rights office said it was "horrified" by the destruction of Gaza's two biggest hospitals, Al-Shifa in Gaza City and the Nasser Medical Complex in Khan Younis, and reports of mass graves discovered there.
Gaza's Civil Defence agency said Tuesday that health workers uncovered nearly 340 bodies of people allegedly killed and buried by Israeli forces at the Nasser complex.
Around 30 bodies were reported found buried in two graves in the Al-Shifa courtyard.
Hospitals, which have protection under international law, have repeatedly come under Israeli bombardment over more than six months of war in Gaza.
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