Israel has agreed to pause operations in northern Gaza for four hours a day from Thursday, the White House said.
US national security spokesperson John Kirby said the pauses would allow people to flee along two humanitarian corridors and were significant first steps.
"We've been told by the Israelis that there will be no military operations in these areas over the duration of the pause, and that this process is starting today," he added.
The pauses, which would be announced three hours in advance, emerged out of discussions between US and Israeli officials in recent days, including talks US President Joe Biden had with Israeli Prime Minister Benjamin Netanyahu, Kirby said.
Meanwhile, in Paris, officials from about 80 countries and organisations were meeting to coordinate humanitarian aid to Gaza and find ways to help wounded civilians escape the siege, now in its second month.
Israeli troops and tanks pushed on Saturday into parts of a congested northern Gaza Strip district that they had previously skirted in the more than seven-month-old war, killing and wounding dozens of Palestinians, medics and residents said.
Slovak Prime Minister Robert Fico is no longer in immediate danger but still in a serious condition, his deputy said on Sunday, four days after an assassination attempt that sent shockwaves through Europe.
At least 47 people have died after continued heavy rain and flooding in northern Afghanistan, an official said on Sunday, a day after a similar number were killed in a central province.
Russian airstrikes killed at least ten people and injured many others in a recreation area just outside Ukraine's northeastern city of Kharkiv on Sunday, local officials said.