The other 14 countries on the council voted in favor of the draft as a humanitarian crisis grips the enclave of more than 2 million people, where famine looms and aid has only trickled in since Israel lifted an 11-week blockade last month.
“The United States has been clear: We would not support any measure that fails to condemn Hamas and does not call for Hamas to disarm and leave Gaza," Acting US Ambassador to the UN Dorothy Shea told the council before the vote, arguing that it would also undermine US-led efforts to broker a ceasefire.
The Security Council vote came as Israel pushes ahead with an offensive in Gaza after ending a two-month truce in March. Gaza health authorities said Israeli strikes killed 45 people on Wednesday, while Israel said a soldier died in fighting.