Israel and Hamas have reached an agreement on a ceasefire and the release of hostages that will end more than a year fighting in the Gaza StripUS officials told CBS News reporter Margaret Brennan on Wednesday. Another source familiar with the negotiations told CBS News that the deal was reached after the Qatari prime minister met with Hamas negotiators, and specifically Israeli negotiators, in his office.

The deal comes after a week of intensive negotiations mediated by Qatar, the US and Egypt.

When news of the deal was announced, crowds gathered in Deir al Bala, Gaza, and celebratory gunfire was heard.

It was a draft agreement agreed in principle earlier this week, Arab, American and Israeli officials told CBS News.

Intense negotiations have been underway in Doha for the past few weeks, and President Biden’s top Middle East adviser, Brett McGurk, has been in the region for most of the month. McGurk worked closely with President-elect Donald Trump’s selection of Special Envoy for the Middle East, Steve Witkoff. Mr. Biden spoke by phone with Israeli Prime Minister Benjamin Netanyahu on Sunday about the talks.

In Israel, the families of approximately 100 hostages still being held after Hamas’ brutal attack on October 7, 2023, in which the group and allied militants killed around 1,200 people, have been holding regular rallies to demand a negotiated settlement for the release of their loved ones. The Israel Defense Forces said they believed about a third of the hostages had already died.

More than 46,000 Palestinians in Gaza have been killed in Israeli attacks since the start of the war, according to the Hamas-run Gaza health ministry, and most of Gaza’s population has been displaced and lives in camps. There were humanitarian groups struggling to deliver aidand experts warned of hunger.

What is in the cease-fire agreement between Israel and Hamas?

Details of the deal have yet to be officially announced, but it appears to build on the arrangement Mr. Biden outlined last year.

According to the draft, intermediate sources reviewed by CBS News earlier this week, it will consist of three phases, each lasting about 42 days.

During the first phase, Hamas would release 33 women and children held hostage, as well as hostages over the age of 50, according to a draft seen by CBS News. For every woman or child hostage returned to Israel, Israel would release 30 Palestinian women and children from its prisons. Hamas would release all hostages over the age of 50, and Israel would release 30 Palestinian prisoners over the age of 50.

A senior Israeli official told CBS News that the release of hostages from Israel would begin on the first day of the 42-day ceasefire period.

On that first day, Hamas would release three hostages, according to a draft seen by CBS News. On the seventh day, Hamas will release the four hostages. Thereafter, Hamas would release three hostages taken from Israel every seven days, starting with the living and then returning the bodies of those who died.

During the hostage and prisoner exchange, there would be a complete ceasefire in Gaza to allow aid to enter, according to the draft seen by CBS News. International aid groups and the United Nations would resume operations in Gaza and begin rebuilding the enclave’s infrastructure, such as water, electricity and sewage systems.

The second phase of the deal would include the release of all remaining male Israeli hostages and the withdrawal of IDF forces from Gaza, according to the document seen by CBS News.

The third phase would involve exchanging the bodies of hostages and prisoners, beginning the reconstruction of Gaza and opening its borders.

Margaret Brennan, Marwan Al-Ghoul, Mais Al-Bayaa and Michal Ben-Gal contributed to this report.

This is the latest news and will be updated.