The Tanaiste has described Israeli strikes in Gaza as a “war crime”, saying that people are being forced from their homeland.
It comes as Palestinian medical officials said that an Israeli strike in Gaza had killed a family of eight.
The strike late on Saturday hit a home in the Nuseirat refugee camp, killing parents and their six children who ranged in age from eight to 23, according to the Al-Aqsa Martyrs Hospital in nearby Deir al-Balah where the bodies were taken.
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Micheal Martin said the scenes unfolding in Jabalia, north of Gaza, are “horrific” and must stop.
“An offensive by the Israeli Defence Forces (IDF), backed by tanks and air strikes, has left dozens of civilians dead, many close to starvation, and access to humanitarian aid extremely curtailed,” Mr Martin said in a statement.
“An entire population is being encircled and forced out, with nowhere for them to go.
“This represents a mass expulsion of people from their homeland.
“It is a war crime, and the international community must use every lever at its disposal to pressure Israel to stop this war.
“The UN and the world’s media must be allowed immediate access to witness what is happening. This war must end.
Helen McEntee said the escalation of violence is Lebanon was ‘extremely worrying’ and the safety of Irish peacekeepers was being kept under constant review (Brian Lawless/PA)
“I will be raising our profound concern and the urgency of bringing an end to this devastation at the Foreign Affairs Council meeting in Luxembourg tomorrow.”
Meanwhile, Minister for Justice Helen McEntee said the escalating violence in Lebanon is “extremely worrying”.
She said the safety of Irish peacekeepers is consistently kept under review.
On Saturday, it was reported by the United Nations that another peacekeeper was injured by gunfire in southern Lebanon.
The peacekeeper at the United Nations Interim Force in Lebanon (Unifil) headquarters in Naqoura was hit by gunfire on Friday following ongoing military activity in the area.
Unifil said it could not confirm the origin of the gunfire.
Taoiseach Simon Harris during a bilateral meeting with US President Joe Biden at the White House in Washington DC (Tasos Katopodis/PA)
Ms McEntee said on Sunday: “Our troops are accounted for, they’re safe, but we can clearly see things are escalating even further, and the violence and the escalation in the region is extremely worrying.
“This is something that is kept under consideration consistently, we’re getting hourly reports from the UN as to what is happening.
“Obviously, the uniform troop work together. Our peacekeepers are not the only country there represented, and the decision had been taken over the last number of weeks to stay there.
“These are hugely capable, experienced peacekeepers, but we need to make sure that they are safe, and obviously, following that announcement, I’m sure there will be further engagement in our Taoiseach.
“Israel are not listening here. Israel have crossed international law. They do so every time they injure and kill innocent civilians, be it in Gaza or elsewhere, and now they are directly targeting uniform peacekeepers.”
Social Democrats TD Gary Gannon was critical of the Taoiseach’s visit to the US where he met with President Joe Biden earlier this week.
“I think there was an incredible opportunity this week for Simon Harris to say something meaningful,” he said.
“The two things he didn’t say was the word genocide, which Israel is carrying out in Gaza using US weapons.
“He also didn’t highlight to the US president, that those same weapons being fought on the Unifil troops have been provided with the US.
“He could have made a stand and called for the suspensions of arms sales, such as the Spanish prime minister did a very short time after our Taoiseach left.
“I think he failed in his obligations to ourselves. I think he failed his obligations under the Genocide Act and I think he really let down those peacekeeping troops, not just the Irish ones, but the other 10,000 who are putting themselves in harm’s way.”