Watch a view of the Rafah crossing on Saturday 21 October as humanitarian aid entered Gaza.
The US embassy in Israel said the Gaza-Egypt border would open, suggesting that such a move would enable foreigners to leave the besieged Palestinian enclave.
In a social media post, the embassy said it had “received info” that the Rafah crossing was to open at 10am local time (7am GMT).
“We do not know how long it will remain open for foreign citizens to depart Gaza,” the embassy added.
On Friday, Rishi Sunak confirmed the crossing should reopen “imminently” to allow aid into Gaza, after meeting the Qatari and Egyptian leaders in crisis talks.
The Prime Minister said that getting aid trucks into Gaza was the “immediate priority”.
“When this crisis unfolded, one thing we have prioritised consistently is getting the Rafah crossing opening,” Mr Sunak said.
“It’s been a feature of all my conversations, and I’m very pleased that that will now imminently happen.”