South Africa filed the case at the top UN court in December charging that Israel's war on Gaza has breached the 1948 UN Genocide Convention.

Israel has strongly denied the accusation, despite mounting evidence of its war crimes in the besieged territory.

"We are headstrong," Ramaphosa told journalists when asked about the case. "We are determined to go ahead with our case."

The country is due to file facts and evidence to the UN court next month to back up its case.

"Preparations are underway to present what they call the memorial, a huge tome of hundreds and hundreds of pages," the president said.

"We continue arguing that the genocide must stop and there must be a ceasefire, and similarly, there must be a return of the hostages."

Several countries, including Nicaragua, Palestine, Turkey, Spain, Mexico, Libya, Chile and Colombia, have joined South Africa’s case against Israel.

Egypt has also announced it will intervene in support of South Africa’s genocide case against Israel, citing the growing scale of Israeli attacks against Palestinian civilians in the Gaza Strip.

Israel's relentless bombardment and ground invasion have killed at least 41,118 Palestinians in Gaza. The UN rights office says most of the dead are women and children.

The Israeli war has also left large swathes of Gaza in ruins and displaced the vast majority of its 2.4 million people at least once.

*This story was edited by Ahram Online.