Militant group accuses the US president of seeking to undermine deal with his ultimatum for release of hostages

Hamas has accused Donald Trump of seeking to undermine the shaky pause in hostilities in Gaza with his latest intervention in the region: a new and fierce ultimatum telling the group to release all hostages.

The militant Islamist organisation said Trump’s threats constituted support for attempts by the Israeli prime minister, Benjamin Netanyahu, to back out of the ceasefire agreement.