Israel ignored global outcry to send tanks into the center of Rafah for the first time Tuesday, witnesses said, weeks into a ground operation in the southern Gaza city.

The tanks were spotted near Al-Awda mosque, a central Rafah landmark, the witnesses told Reuters. The Israeli military said its forces continued to operate in the Rafah area without commenting on reported advancements into the city center.

Overnight, its forces pounded the city with airstrikes and tank fire, residents said, pressing its offensive despite an international outcry over an attack on Sunday that sparked a blaze in a tent camp, killing at least 45 Palestinians, more than half of them children, women and the elderly.

Since that strike, at least 26 more people have been killed by Israeli fire in Rafah, Gaza officials said.

Israeli tanks pushed toward western neighborhoods and took positions on the Zurub hilltop in western Rafah in one of the worst nights of bombardment reported by residents. On Tuesday, witnesses reported gun battles between Israeli troops and Hamas resistance members in the Zurub area.

Witnesses in Rafah said the Israeli military appeared to have brought in remote-operated armored vehicles and there was no immediate sign of personnel in or around them. An Israeli military spokesperson had no immediate response.

Since Israel launched its incursion by taking control of the border crossing with Egypt three weeks ago, tanks had probed around the edges of Rafah and entered some of its eastern districts but had not yet entered the city in full force.

Reacting to Sunday night's attack in a camp where families displaced from assaults elsewhere in Gaza had sought shelter, global leaders urged the implementation of a World Court order to halt Israel's assault.

Residents said the Tel Al-Sultan area, the scene of Sunday's deadly strike, was still being heavily bombarded.

"Tank shells are falling everywhere in Tel Al-Sultan. Many families have fled their houses in western Rafah under fire throughout the night," one resident told Reuters over a chat app.

Around 1 million people have fled the Israeli offensive in Rafah since early May, the U.N. agency for Palestinian refugees (UNRWA) reported Tuesday.

Israel has kept up attacks despite a ruling by the top U.N. court on Friday ordering it to stop, arguing that the court's ruling grants it some scope for military action there.

Spain, Ireland and Norway, meanwhile, will officially recognize a Palestinian state Tuesday, despite an angry reaction from Israel, which has found itself increasingly isolated after more than seven months of conflict in Gaza.

The three nations have painted their decision as a way to speed efforts to secure a cease-fire in Israel's war with Hamas.

More than 36,000 Palestinians have been killed in Israel's offensive, Gaza's Health Ministry says.