Ireland has a 'legal obligation' to prevent genocide in Gaza, Irish development agency Trócaire has said.
It said the Government is duty-bound under the United Nations Genocide Convention to assess whether there is a risk that genocide is being committed.
It follows a case taken by South Africa against Israel at the International Court of Justice in The Hague, where Israel is accused of genocide against the Palestinians.
Trócaire CEO Caoimhe de Barra said Ireland's call for a ceasefire is no longer enough.
"The Irish Government must act urgently as the Israeli military is killing an average of 250 Palestinians per day in Gaza, a higher daily death rate than any other 21st century armed conflict," she said.
"Israel's unrelenting military campaign on the Gaza Strip has resulted in more than 25,000 deaths and the displacement of 1.9 million people.
"One-in-four people in Gaza are facing immediate risk of starvation. These acts are war crimes."
Ms de Barra said the "desperate situation" has led UN experts and Trócaire partners to warn that there is "an immediate risk of genocide" in the Gaza Strip.
"Ireland has taken a leadership position in recent months in calling for a ceasefire," she said.
"However, this is no longer enough. Now is the time for measures to be taken to end the violence and suffering, and to prevent further atrocities," she added.
'Support South Africa's case'
Trócaire is calling on the Government to urgently conduct a detailed assessment of whether there is a risk that genocide is being committed in the context of the war.
It said this is "a first step towards fulfilling Ireland's duty to prevent genocide under the Genocide Convention of 1948".
The charity also said Ireland should issue a public statement "in support of South Africa's case at the International Court of Justice (ICJ)" - specifically the provisional measures requested by South Africa that call on Israel to immediately suspend military operations in and against Gaza.
It said Ireland should join the case as an intervener "as soon as possible" as it did in the Ukraine v Russia case at the ICJ.
Taoiseach Leo Varadkar has previously said he would "be a little bit uncomfortable" labelling Israel's actions as 'genocidal'.
The Palestinian death toll in Israel's assault on Gaza has passed 25,000, according to the territory's health ministry.
