“We are horrified by this deadly event, which shows once again that nowhere is safe,” said MSF on social media.

The images out of Rafah on Sunday included videos of tents being engulfed in flames and charred corpses, and one showed a man holding up what appeared to be the body of a small child who had been beheaded. NBC News reported that it “was not able to independently verify the situation on the ground.”

“This U.S.-backed massacre of civilians is a direct result of the Biden administration’s enduring political and military support for Israel’s genocide in Gaza,” said Nihad Awad, national executive director of the Council on American-Islamic Relations, on Monday. “The Palestinian child shown without a head would still be alive today had our government not offered Israel’s far-right government unceasing support for the slaughter of Palestinian civilians and the ethnic cleansing of Gaza. Those who support genocide are just as guilty as those who drop American-supplied bombs on civilians.”

As major news outlets like The New York Times and The Washington Post buried the news of the attack under unrelated stories, journalist Mehdi Hasan condemned the silence of the Biden administration and the “U.S. political and media establishments.”

Jan Egeland, secretary general of the Norwegian Refugee Council, directed ire at European Union leaders who have continued to back Israel’s bombardment of Gaza, demanding to know “how many more red lines must be crossed before the E.U. decides to act?”

“The U.S. government has facilitated this genocide by continuously sending weapons and funding to the Israeli military, despite mass opposition from the American people,” the group added. “We hold the U.S. government, in addition to the Israeli government, responsible for the slaughter of over 36,000 Palestinians, for the siege and starvation of Palestinians in Gaza, and for mass destruction of infrastructure and land. We demand an end to all U.S. funding to the Israeli military now. People of conscience throughout the world are calling for an end to genocide.”