He was the younger brother of Yahya Sinwar, the former Hamas leader killed by Israel last year. Hamas did not immediately respond to the claim of his death.
Officials said Hamas was seeking changes on guarantees for a permanent end to war. That has long been the core sticking point with Israel.
The trip had been planned for Sunday ahead of a June conference, backed by France and Saudi Arabia, to urge the creation of a Palestinian state.
The extremist group claimed responsibility for two attacks, its first against the new government since the fall of Bashar al-Assad, a war monitoring group said.
The industry is bracing for the OPEC Plus oil cartel’s meeting on Saturday, which is widely expected to further increase oil production despite weak demand.
As more Gazans fled their homes in the north, international demands grew louder for Israel to allow an urgent and massive injection of aid to stave off famine in the territory.
Aid began to trickle into the territory this week. But there is never enough.
The U.S. has sent an Israeli-backed cease-fire proposal that would allow the flow of aid into Gaza. Hamas appeared skeptical of the offer.
The United Nations says food being distributed by a new Israeli-backed system is “less than a drop in the ocean.”
Facing rising pressure over the acute suffering of civilians in Gaza, the British government is considering sanctions on two far-right ministers, Itamar Ben-Gvir and Bezalel Smotrich.
The intricate scheme, spanning four continents, appears to justify concerns that the military arsenal of Bashar al-Assad, the deposed Syrian dictator, could fall into dangerous hands.
The new operation is intended to bypass both the United Nations and Hamas, but aid groups say even if it works as intended, it is dangerously inadequate.
Israel said the bombing of the airport, which was targeted for the second time this month, had destroyed the last plane used by the Iran-backed Houthi militia.
Prime Minister Benjamin Netanyahu, wary of a diplomatic solution to curbing Iran’s nuclear program, continues to press for military action that would upend President Trump’s push for a negotiated deal.
Starvation looming, desperate Palestinians surged toward an aid center that Israel says was designed to circumvent Hamas.
Israel, Hamas and the Trump administration have issued different messages about where efforts to reach a truce stand.
The death of Amer Rabee, a Palestinian American in the West Bank, has spurred anger over soldiers’ use of force and an apparent lack of accountability.
For months, Israel’s strongest allies had been reluctant to join a wave of global censure against the war. Now, even the Trump administration appears to be growing impatient.
Yaron Lischinsky, 30, was buried on Sunday in the small town where his family lived.
Two more children were missing, and the doctor’s husband and one other child were injured in the strike on Friday, the officials said. Israel said it was checking if it had harmed “uninvolved civilians.”
A wealthy Qatari businessman’s campaign to lead the sport’s global body is being investigated. One of his critics was detained and interrogated in Doha.