CNN —Editor’s Note: This story contains graphic and disturbing accounts of sexual violence. Sheryl Sandberg, a longtime advocate for women and girls’ rights, spoke out against Hamas’ use of sexual violence as a war tactic, saying at the United Nations Monday: “Rape should never be used as an act of war.”“Silence is complicity,” Sandberg said. Witnesses to the aftermath of the attacks say women and girls were sexually assaulted, tortured and killed. In an op-ed published by CNN last month, Sandberg called on the global community to put aside political differences and speak out. “The silence on these war crimes is deafening,” Sandberg added.

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Persons: Sheryl Sandberg, ” Sandberg, I’ve, “, we’re, Sen, Kirsten Gillibrand, ” Gillibrand, ”, Hillary Clinton, ” Clinton, Sandberg, Shelly Harush, ” Harush Organizations: CNN, United Nations, Facebook, Lean, Israel, United, Times Locations: New York, ”, London