Israeli strikes on Gaza City kill dozens, Hamas claims.
Buildings demolished during devastating strike in Gaza.
Two Israeli air raids on buildings in Gaza City killed at least 38 people and injured many more, according to Hamas.
The Israeli military claimed airplanes had attacked Hamas military infrastructure locations and would release additional information later.
A spokeswoman for Gaza's civil defense claimed a residential block in the al-Shati neighborhood, one of Gaza's old refugee camps, was hit numerous times.
The other strike targeted houses in the al-Tuffah district, according to the Hamas-controlled government media office.
People were seen carrying the wounded and looking for survivors amid the wreckage as dust filled the streets.
Earlier estimates putting the dead toll at 42.
According to Israeli media, the airstrikes may have targeted a senior Hamas official.
Hussein Muhaisen, a civil defense spokesperson in Gaza City, told AFP that the attacks had a "like an earthquake" impact.
"The entire region was targeted, and you can see that homes were demolished.
"There are still families under the rubble," he stated.
"Some of the injured were transferred to the Baptist Hospital, and now we are rescuing others from under the rubble, and the situation is very, very difficult due to the lack of tools and fuel for ambulances."
Meanwhile, the EU's foreign policy leader, Josep Borrell, criticized Friday's bombing of the International Committee of the Red Cross (ICRC) offices in Gaza, which killed 22 people who took refuge near the property.
Mr Borrell asked for an impartial investigation and accountability for those involved.
On Saturday, the Israel Defense Forces (IDF) stated that an initial investigation into the firing in the al-Mawasi neighborhood of southern Gaza revealed "no direct attack carried out by the IDF against a Red Cross facility".
It stated that the incident would be "quickly examined" and the results presented.
Israel initiated a campaign to destroy Hamas in reaction to an unprecedented onslaught on southern Israel on October 7, which killed around 1,200 people, the majority of whom were civilians, and kidnapped 251 more.
More than 37,551 people have died in Gaza since then, according to the Hamas-run health ministry.
Its estimates do not distinguish between civilians and fighters, but as of the end of April, it has identified 14,680 children, women, and the elderly among the dead.
