Germany, Britain and France on Friday called for an "immediate" halt to Israel's military offensive in Gaza City and condemned Israel's strike in Qatar this week.
The foreign ministers of the three European powers said in a joint statement that "the focus must remain on reaching a permanent ceasefire, the release of all remaining hostages and flooding Gaza with aid to stop the famine."
"We urgently call for an immediate halt to Israeli military operations in Gaza City, which are causing mass civilian displacement, civilian casualties and destruction of essential infrastructure," they added.
"We call for the UN and humanitarian NGOs to be able to work safely and at scale across the entire Strip, including the North," they said.
The statement said Israel's strike Tuesday that targeted senior Hamas officials based on Doha, "violate Qatar's sovereignty and risk further escalation in the region".
The ministers said Qatar was playing a "vital role" in seeking to mediate between Israel and Hamas, which unleashed the war with its October 7, 2023 attacks.
US President Donald Trump will meet Qatar's prime minister on Friday, the White House announced.
The United States backed a UN Security Council resolution on Friday that condemned the strikes in Qatar, without naming Israel. The UN General Assembly voted meanwhile to back a resolution on a two-state solution between Israel and the Palestinians, a vote immediately denounced as "disgraceful" by Israel.
Fifty reported dead in Gaza as Israel steps up attacks on main city
Israeli military operations killed 50 people in Gaza on Friday, the territory's civil defence agency said, as the army stepped up its attacks on Gaza City.
Israel has said it intends to capture the territory's largest urban centre, which it claims to be one of the last strongholds of the Palestinian group Hamas, whose October 2023 attack sparked the Gaza war.
The United Nations and members of the international community have warned against the assault for fear it will worsen the already dire humanitarian situation in Gaza City, where the UN has declared a famine.
Gaza's civil defence agency said 35 people were killed in the city on Friday, along with another 15 in other parts of the territory.
The Israeli military said it was continuing "its wide-scale strikes on terrorist infrastructure and high-rise structures" in Gaza City.
A single strike in the northwest of Gaza City killed 14 people, the civil defence said.
"The majority of them are children and women," relative Hazem al Sultan told AFP news agency.
"Only two bodies were intact, while the rest were body parts."
At the city's Al-Shifa hospital, mourners prayed over the the dead wrapped in white shrouds, some of them the size of children.
The UN estimates there were around one million people in and around Gaza City as of late August, and has warned that evacuating them all could have disastrous consequences.
The main organisation representing the families of hostages taken during Hamas's 2023 attack has also criticised the planned Gaza City offensive, saying Friday that Prime Minister Benjamin Netanyahu was putting the surviving captives in "life-threatening danger... without any clear purpose or strategic goal".
Of the 251 hostages seized during the Hamas assault, 47 remain in Gaza, including 25 the Israeli military says are dead.
The attack resulted in the deaths of 1,219 people, mostly civilians, according to Israeli figures.
Israel's deadly offensive has killed at least 64,756 Palestinians, most of them civilians, according to figures from the health ministry in Gaza that the UN considers reliable.