Israeli Prime Minister Benjamin Netanyahu rejected the latest US roadmap accepted by Hamas to launch the second phase of the Gaza peace plan, taking fresh distance from President Donald Trump as he faces razor-tight elections.

After more than a week of gradually escalating criticism of the plan, Netanyahu explicitly opposed it in the face of pushback from his right-wing base.

The Israeli government says any withdrawal of Israeli forces from the Gaza Strip is conditional on the Islamist group being "genuinely" disarmed.

"Israel rejects the 15-point document" presented at the end of July by Donald Trump’s Peace Council, Benjamin Netanyahu said during a cabinet meeting.

The Israeli army would carry out "no withdrawal as long as Hamas is not genuinely disarmed and will continue to thwart threats against our forces and our citizens," Netanyahu said.

Israeli PM described Trump, with whom he has also had a growing break on Iran, as "our greatest friend in the White House" — but quickly made clear he was willing to challenge him.

He said Israel was raising its objections to the Gaza plan with the United States.

"They have ideas; some of them are acceptable to us, and some are not, and we know how to stand our ground on these matters," he said.

Hamas, days after selecting a new leader, Khalil al-Hayya, announced it supported the Gaza plan. It called on the United States to pressure Netanyahu.

"We expect the mediators and the American guarantor to pressure Netanyahu and his government to adhere to the roadmap and not obstruct the process for internal political and electoral reasons," Bassem Naim, a member of Hamas's political bureau, told AFP.

Netanyahu until recently campaigned on the strength of his relationship with Trump, who since his first term has taken unprecedented steps to back Israel, including moving the US embassy to Jerusalem.

Trump joined Netanyahu in late February in attacking Iran. But the two diverged when Trump sought a ceasefire with Iran in April, as the war sapped his popularity at home and sent oil prices soaring.

Netanyahu told his cabinet that "with an agreement or without an agreement, as long as I am prime minister, Iran will not have nuclear weapons", a goal he has long alleged Tehran is pursuing.

Netanyahu last week also ordered fresh strikes on Lebanon in response to what Israel called a ceasefire violation by Iran-backed Hezbollah, just as Israel and Lebanon were holding US-mediated talks.

The Gaza plan was the latest stage in a US-brokered ceasefire announced in October that has reduced but not ended Israeli operations in Gaza.

Trump had described, as a "major milestone," the agreement by Hamas to surrender weapons to a nascent Palestinian governing body.

The plan said Israel would begin pulling out forces in tandem with the disarmament, a timeline adamantly rejected by Israel.

After meeting Netanyahu last week, Trump's body implementing the deal, dubbed the Board of Peace, backtracked and said Israel would only need to withdraw after "complete" disarmament, but it was apparently not enough for the Israeli leader.

Netanyahu said that Hamas must give up all of its weapons.

"We are talking about real disarmament, not fictitious disarmament," Netanyahu said.

Polls show that the Gaza plan is widely unpopular with Netanyahu's right-wing base and far-right members of his cabinet, who have urged him to call a new vote to kill the Gaza plan.

Netanyahu, Israel's longest-serving leader, is running even or trailing in some polls ahead of the 27 October elections, the country's first since the devastating 7 October 2023 attack by Hamas.