Ultimatum appears to endorse threat by Donald Trump, who on Tuesday also appeared to back annexation of West Bank

• Middle East crisis – live updates

Benjamin Netanyahu has said that Israel will resume fighting in Gaza if Hamas does not release more hostages by noon on Saturday, endorsing a threat by Donald Trump that could shatter the three-week-old ceasefire between the two sides.

Netanyahu’s ultimatum was delivered during a video address posted to social media account on Tuesday. “If Hamas does not return our hostages by Saturday noon – the ceasefire will end, and the IDF will return to intense fighting until Hamas is finally defeated,” he said.