UK Prime Minister Rishi Sunak has arrived in Israel, a day after Joe Biden visited the country.
Biden's trip was overshadowed by a blast at a Gaza hospital, which local officials say killed 471 people.
After his visit was announced Wednesday night, Rishi Sunak said, "Every civilian death is a tragedy.
"And too many lives have been lost following Hamas's horrific act of terror.
"The attack on Al Ahli hospital should be a watershed moment for leaders in the region and across the world to come together to avoid further dangerous escalation of conflict. I will ensure the UK is at the forefront of this effort," he said.
Local authorities said an Israeli air strike was to blame - but Israel insists the blast was caused by a misfired rocket from Gaza.
Meanwhile, Israel's military said it hit hundreds of sites in Gaza over the past 24 hours, targeting "Hamas infrastructure"
As its air campaign shows no sign of ending, it says anti-tank missile launch sites, tunnels, and headquarters were destroyed.
Gaza remains under siege, with Israel blocking cross-border supplies of water, electricity, and fuel.
But the US and Egypt say lorries providing aid should start crossing from Egypt into Gaza on Friday.
Bd-pratidin English/Golam Rosul
