Israel's defence minister will meet the families of Israelis held hostage by Hamas, who have expressed concern about the intensifying attacks on Gaza.
"This night was the worst of all nights," said the Hostages and Missing Families Forum after troops carried out raids inside the Palestinian territory.
It complained that no-one had explained "whether the ground operation endangers the well-being of the 229 hostages".
The government has said it is doing everything possible to bring them home.
But the Hostages and Missing Families Forum said their relatives "are anxious about the fate of their loved ones and are waiting for an explanation" of the Israeli military's actions.
Defence Minister Yoav Gallant agreed to meet representatives of the group on Sunday in response to the statement.
The hostages were taken by Hamas gunmen during an unprecedented attack on southern Israel on 7 October in which 1,400 people were killed.
Those in captivity in Gaza include dozens of children and elderly people, as well as military personnel. At least 135 are foreign or dual nationals, including 54 Thais, 15 Argentines and two Britons, according to the Israeli government.
Hamas - which is designated as a terrorist group by Israel, the UK and other powers - has so far released four hostages following mediation by Qatar and Egypt. Two elderly Israeli women were freed on Monday, while an American-Israeli woman and her daughter were freed on 20 October.
There had been speculation before Friday night's ground operation that Qatar-brokered negotiations over another release deal were accelerating.
But Israeli military spokesman Rear Admiral Daniel Hagari said on Saturday that there was "a deliberate desire of parties with interests, led by Hamas, to make cynical exploitation, psychological terrorism, and to influence our population which is in such a sensitive situation".
"Most importantly, when we have the information, we will provide it," he added. "Returning the hostages home is a supreme national effort. And all our activities, operational, intelligence, are aimed at realizing a goal."
Released hostage Yocheved Lifschitz, an 85-year-old grandmother who was kidnapped alongside her husband Oded from Kibbutz Nir Oz, told reporters in Tel Aviv on Tuesday that she "went through hell".
She described being hit by sticks on the journey to Gaza and being taken into a huge network of underground tunnels that "looked like a spider's web".
Mrs Lifschitz also said that most of the hostages were being "treated well".
On Thursday, the spokesman for Hamas's military wing, Abu Ubaida, said around 50 hostages had been killed in Israeli air strikes on Gaza.
He provided no evidence and it was impossible for the OceanNewsUK to verify the claim. But the Israeli military has repeatedly said it has bombed Hamas's tunnels.
