An Israeli soldier aims a weapon as they operate in the Gaza Strip, after a temporary truce between Israel and the Palestinian terrorist group Hamas expired, in this handout picture released on Dec. 1, 2023. Photo: Israel Defense Forces/Handout via REUTERS

Israeli warplanes pounded Gaza, and rocket sirens blared in southern Israel on Friday as war resumed after a week-old truce ran out with no deal to extend it.

As the deadline lapsed, Reuters journalists in Khan Younis in southern Gaza saw eastern areas come under intensive bombardment, sending columns of smoke rising into the sky.

In the north of the enclave, previously the main war zone, huge plumes of smoke rose above the ruins, seen from across the fence in Israel.

Medics and witnesses said the bombing was most intensive in Khan Younis and Rafah in the southern Gaza Strip.

Leaflets dropped on eastern areas of the main southern city Khan Younis ordered residents of four towns to evacuate — not to other areas in Khan Younis as in the past, but further south to the crowded town of Rafah on the Egyptian border.

“You have to evacuate immediately and go to the shelters in the Rafah area. Khan Younis is a dangerous fighting zone. You have been warned,” said the leaflets, written in Arabic.

Israel released a link to a map showing Gaza divided into hundreds of districts, which it said would be used in future to communicate which areas were safe.

Each side accused the other of rejecting terms to extend the truce, which had involved freeing hostages seized by Hamas and other terrorists in the deadly Oct. 7 raid into Israel that precipitated the war, and the release of Palestinians held in Israeli jails.

“With the resumption of fighting we emphasize: The Israeli government is committed to achieving the goals of the war — to free our hostages, to eliminate Hamas, and to ensure that Gaza will never pose a threat to the residents of Israel,” the office of Israeli Prime Minister Benjamin Netanyahu said.

Ezzat El Rashq, a member of the Hamas political bureau, said on the group’s website: “What Israel did not achieve during the 50 days before the truce, it will not achieve by continuing its aggression after the truce.”

The pause, which began on Nov. 24 and was extended twice, had allowed for daily exchanges of Israeli hostages held in Gaza for Palestinian detainees, while trucks brought in aid.

Israel, which rejects calls for a permanent ceasefire, had said the temporary truce could continue as long as Hamas released 10 hostages each day. But after seven days during which women, children, and foreign hostages were freed, mediators failed at the final hour to find a formula to release more, possibly including Israeli men.

Qatar, which has played a central role in mediation efforts, said negotiations were still ongoing with Israelis and Palestinians to restore the truce, but that Israel‘s renewed bombardment of Gaza had complicated its efforts.

Israel has sworn to annihilate Hamas in response to the Oct. 7 rampage by the terrorist group, when Israel says gunmen killed 1,200 people and took 240 hostages. Hamas, sworn to Israel‘s destruction, has ruled Gaza since 2007.

US Secretary of State Antony Blinken, who had met Israeli and Palestinian officials on Thursday on his third trip to the region since the war began, declined to comment on the collapse of the truce to reporters traveling on his plane.

The day before, Blinken had called on Israel to do more to protect civilians once fighting resumes. He had praised the truce and said Washington hoped it would be extended.