There has been no official word from either side as to whether there has been a pause in the fighting - however, the truce period was due to start at 7am local time (5am UK).

However, sirens were sounded just minutes into the truce in Israel, warning two villages close to the Gaza border of possible rocket attacks fired from Gaza, the Israel Defence Forces (IDF) said.

Israel-Gaza latest - follow live

The IDF said it had "completed its operational preparations according to the combat lines of the pause".

"Earlier this morning, IDF troops destroyed the terror tunnel that was revealed in the area of the Shifa Hospital.

"Over the last day and night, IDF troops on the ground, in the air, and at sea continued to strike terror targets, operate in different areas to locate suspicious structures and engage with terrorists.

"In addition, the forces struck a terror tunnel route, which was identified over the past few days."

The handover of up to 50 Israeli captives is expected to be carried out in stages as the temporary pause in hostilities got under way.

The agreement - brokered by Qatari mediators - will see a halt to the IDF bombardment of Gaza to allow a swap of hostages for Israeli prisoners.

As many as 30 Palestinians being held in Israeli jails are due to be sent in the opposite direction.

Among those released by Israel will be 24 women and 15 teenage males, Reuters reported, citing Palestinian officials.

The temporary truce is expected to last for four days.

Avichay Adraee, the IDF's spokesperson for Arab media, reiterated the truce will only last four days, saying in a video on X (formerly Twitter): "The war is not over yet."

He added: "The northern Gaza Strip is a dangerous war zone, and it is forbidden to move north."

"For your safety, you must remain in the humanitarian zone in the south."

However, videos from the Associated Press show displaced Gaza City residents heading back north, despite the warning from the IDF.

Sofian Abu Ame was one of those heading back, and said: "We are returning to our homes to see and check our conditions there and how our homes are. We want to bring clothes and what we need. There is no cooking gas, food, or drink. The situation is very tragic."

Alongside the exchange of hostages and prisoners, aid will be allowed into Gaza after the seven-week siege saw fuel and medical supplies cut off.

The first hostages are due to be freed at 4pm local time (2pm UK) this afternoon, followed by the next stages of the agreement.

Read more:
Hostage-for-prisoner swap and truce in Gaza
Israel has questions to answer after WHO's report
Hamas claims 'at least 50 killed' in attack on school

The deal was finalised after weeks of negotiations involving Qatari mediators and backed by US President Joe Biden.

Israel launched its war in Gaza after Hamas gunmen stormed across the border fence on 7 October - killing 1,200 people and seizing about 240 hostages.

More than 13,300 Palestinians have been killed since Israel's bombardment began, according to the Hamas-run health ministry in the territory.