Hamas is the Shiite militant group holding control in Gaza and Hezbollah is the political faction backed by Iran in Lebanon.
Meanwhile, Iran’s mission to the United Nations, said on Sunday that Tehran was not involved in the deadly attack. "The resolute measures taken by Palestine constitute a wholly legitimate defense against seven decades of oppressive occupation and heinous crimes committed by the illegitimate Zionist regime," Iran's UN mission said in a statement.
Iran said that it “emphatically” stands in unflinching support of Palestine, but is “not involved in Palestine’s response as it is taken solely by Palestine itself”.
Iran's UN mission said the "success" of the Hamas operation was because it was a surprise, which makes it the "biggest failure" of Israel's security organisations. "They are attempting to justify their failure and attribute it to Iran's intelligence power and operational planning," Iran's UN mission said.
Iran said that Israel is finding it very difficult to accept the narrative in the intelligence community that they were being defeated by a Palestinian group.
Israeli air strikes, following Hamas’ attacks, hit houses, tunnels, a mosque, and homes of Hamas members in Gaza, killing over 400 people, including 20 children.
Also read: Israel-Hamas war: Over 1,000 dead so far; US, French, Nepali nationals among those killed
Also read: Over 100 kept as 'prisoners' by Hamas: Israeli government
Also read: Israel-Gaza war: Thai citizens taken hostage, 370 Palestinians killed in Israeli airstrikes - 10 points
Also read: 'India-Middle East-Economic Corridor is effectively dead': Fears grow as Israel declares war on Hamas