By Nidal al-Mughrabi, Dan Williams and Humeyra Pamuk
GAZA/JERUSALEM/CAIRO (Reuters) -Hopes for a brief ceasefire in southern Gaza to allow foreign passport holders to leave the besieged Palestinian enclave and aid to be brought in were dashed on Monday, with Israeli bombardments intensifying ahead of an expected ground invasion.
Residents of Hamas-ruled Gaza said the overnight strikes were the heaviest yet in nine days of conflict. Many houses were flattened and the death toll rose inexorably, they said.
Diplomatic efforts have been underway to get aid into the enclave, which has endured unrelenting Israeli bombing since the Oct. 7 attack on Israel by Hamas militants that killed 1,300 people - the bloodiest single day in the state's 75-year history.
Israel has imposed a full blockade and is preparing a ground invasion to enter Gaza and destroy Hamas, which has continued to fire rockets at Israel since its brief cross-border assault. Israeli troops and tanks are already massed on the border.
Authorities in Gaza said at least 2,750 people had so far been killed by the Israeli strikes, a quarter of them children, and nearly 10,000 wounded. A further 1,000 people were missing and believed to be under rubble.
As the humanitarian crisis deepened, with food, fuel and water running short, hundreds of tons of aid from several countries have been held up in Egypt pending a deal for its safe delivery to Gaza and the evacuation of some foreign passport holders through the Rafah border crossing.
Earlier on Monday, Egyptian security sources had told Reuters that an agreement had been reached to open the crossing to allow aid into the enclave.
But Israeli Prime Minister Benjamin Netanyahu's office said in a statement: "There is currently no truce and humanitarian aid in Gaza in exchange for getting foreigners out."
Hamas official Izzat El Reshiq told Reuters that there was "no truth" to the reports about the opening of the crossing with Egypt or a temporary ceasefire.
Egypt has said the crossing remained open from the Egyptian side in recent days, but was rendered inoperable due to Israeli bombardments on the Palestinian side.
The situation remained unclear at the Rafah crossing, the only one not controlled by Israel. Reuters journalists said a small crowd of people had gathered there waiting to enter Egypt.
The United States had told its citizens in Gaza to get close to the crossing so they can move out. The U.S. government estimates the number of dual-citizen Palestinian-Americans in Gaza at 500 to 600.
Washington is also seeking to secure the release of 155 hostages, including Americans, Israel says were taken by Hamas back into Gaza.
U.S. President Joe Biden stressed the urgent need to get humanitarian aid to Palestinian civilians in calls on Saturday with Netanyahu and Palestinian Authority President Mahmoud Abbas, the White House said.
Biden has also urged Israel to follow the rules of war in its response to the Hamas attacks.
"The overwhelming majority of Palestinians had nothing to do with Hamas' appalling attacks and are suffering as a result of them," he said.
HEAVY BOMBING
Israeli aircraft bombed areas around Gaza City's Al-Quds hospital early on Monday and ambulances at the facility were unable to move due to the strikes, Palestinian media reported.
Israel has urged Gazans to evacuate south, which hundreds of thousands have already done in the enclave, home to about 2.3 million people. Hamas has told people to ignore Israel's message.
Reserves of fuel at all hospitals across the Gaza Strip are expected to last only around 24 more hours, putting thousands of patients at risk, the United Nations humanitarian office (OCHA) said.
In Tel Al-Hawa in Gaza City, Israeli planes bombed a main road and damaged surrounding houses, forcing hundreds of residents to take shelter in the Red Crescent's Al-Quds Hospital, residents said.
Israeli planes bombed three headquarters of the Civil Emergency and Ambulance Service in Gaza City, killing five people and paralyzing the rescue services in those areas, health officials said.
In a bombing of a house belonging to the Abu Mustafa family in Khan Younis refugee camp, five members of a family were killed.
Suhail Baker, 45, said he woke up to the sound of an explosion from an Israeli air strike that destroyed the house of his neighbour, killing five people.
"We woke up in horror, and we see them dismembered, it took a long time to remove the rubble by the bulldozers to recover the bodies," said Baker.
At a nearby street in Khan Younis, Abu Ahmed, an elderly man sitting outside his house, said: "Israel has taken a decision to kill every last one of us."
More than one million people – almost half the total population of Gaza - have been displaced within the enclave.
The United Nations agency UNWRA said it was struggling to cope with their needs.
People across Gaza have severely limited access to clean drinking water. As a last resort, people are consuming brackish water from agricultural wells, raising concerns over the spread of waterborne diseases.
For the fifth consecutive day, Gaza has had no electricity, pushing vital services, including health, water and sanitation to the brink of collapse, and worsening food insecurity.
(Reporting by Nidal al-Mughrabi in Gaza, Ari Rabinovitch, Dan Williams, Henriette Chacar, Dedi Hayun, Maayan Lubell, Emily Rose, James Mackenzie and John Davison in Jerusalem, Parisa Hafezi in Dubai, Humeyra Pamuk, Hatem Maher, Ahmed Tolba and Omar Abdel-Razek in Cairo, Nandita Bose, Rami Ayyub and Katharine Jackson in Washington, Michelle Nichols at the United Nations; Writing by Angus MacSwan, Editing by Miral Fahmy and Philippa Fletcher)