Israeli warplanes continued their relentless bombing of downtown Gaza City, the city where Hamas’s main government centers are located, into early Tuesday after Prime Minister Binyamin Netanyahu vowed a “repercussions” against the Islamist militant group that would last “a generation.”

The four-day war has already killed more than 1,600 people, as Israel endured its first gun battles in its own cities in decades and neighborhoods in Gaza were left in ruins. The Israeli military reported that more than 900 people had been killed in Israel, and that 704 had been killed in the Gaza Strip and the West Bank.

The authorities in Gaza reported that hundreds of Hamas fighters had been killed, and that thousands of people had been injured on both sides. The Israeli military said that more than 150 people had been taken from inside Israel by Hamas and other groups in Gaza, after the attack caught the Israeli military and intelligence completely off guard.

The UN Human Rights Office urged all countries with influence to take action to de-escalate the conflict, saying the UN wants to “keep the human rights of the civilian population at the forefront.”

“We have seen horrendous civilian deaths, both in Israel and in the Palestinian territories,” Throssell said. “Aid organizations have called for humanitarian corridors to be established to bring aid into Gaza, saying hospitals overwhelmed by the number of wounded are running out of supplies.”

The UN said Israel has blocked all access to food, fuel and medicine into Gaza. “For us, what’s important to emphasize is that restricting or cutting off essential supplies, such as food, water and electricity, is prohibited unless it is justified by what is called in legal terms ‘a military necessity,’ said Throssell.

The White House said that US President Joe Biden will meet with Israeli Prime Minister Binyamin Netanyahu on Tuesday to discuss “coordination with allies to defend Israel and protect innocent people against terrorism.”

Hood said that direct US intervention in the Gaza conflict is a “red line” and that the Houthis will respond by launching drones and missiles.