Qatar confirmed on Wednesday that Israel and Hamas had reached an agreement on a four-day humanitarian pause in exchange for the release of 50 hostages in Gaza.

"The starting time of the pause will be announced within the next 24 hours and last for four days, subject to extension," Qatar's foreign ministry said in a statement.

"The agreement includes the release of 50 civilian women and children hostages currently held in the Gaza Strip in exchange for the release of a number of Palestinian women and children detained in Israeli prisons, the number of those released will be increased in later stages of implementing the agreement," it added.

Qatar has been engaged in weeks of intense, behind-the-scenes negotiations aimed at freeing some of the 240 hostages held in Gaza in return for a temporary ceasefire and access to humanitarian aid.

Hamas gunmen stormed across Gaza's militarized border on 7 October and staged the worst attack in Israel's history.

Israel says the attack killed 1,200 people, mostly civilians, and that around 240 people were taken hostage, among them elderly people and children. 

In response, Israel launched a relentless bombing campaign and ground offensive in Hamas-ruled Gaza, which the Hamas government claims has killed thousands of people.

Qatar said the deal had been undertaken with Egypt and the United States as well as Hamas and Israel and would include "the entry of a larger number of humanitarian convoys and relief aid, including fuel designated for humanitarian needs".

Qatar's foreign ministry spokesman Majed Al-Ansari told AFP the release of the 50 hostages held by Hamas would be staggered over the four-day truce. 

"The truce begins and then every day within the four days we will have a number of hostages coming out… and that number should reach 50 by day four," he said.

The expectation was that the initial 50 women and children hostages released by Hamas would be followed by further releases to extend the initial four-day truce.