"It is clear that there has been an invasion by a third country of a sovereign state such as Lebanon, and therefore the international community cannot remain indifferent," the Socialist premier told parliament.

"We denounced (this situation) in Ukraine, we also denounced it in Gaza and now we are also denouncing the invasion of Lebanon," he added.

Israel launched ground incursions into southern Lebanon on September 30 where some 10,000 peacekeepers are deployed under the command of a Spanish general.

At least 1,473 people have died in Lebanon since mid-September when the Israeli army dramatically escalated its attacks, according to the latest figures from the Lebanese Health Ministry.

Since Israel and Hezbollah began exchanging fire across the border one year ago today, at least 2,083 people have been killed, including 127 children and 261 women, and 9,869 have been wounded, the ministry said.

Sanchez is one of the most outspoken critics among European Union leaders of Israel's brutal military campaign on the Gaza Strip since October 7, 2023.

He has angered Israel by saying he had "serious doubts that Israel is complying with international humanitarian law" in Gaza and under his watch Madrid in May recognised a Palestinian state.

Sanchez also expressed his regret at the "lack of agreement within the European Union" on the situation in the Middle East.

"I regret this because I believe that on these issues, we should be consistent not with our position, but consistent with the defense of international law and international humanitarian law," he said.

* This story was edited by Ahram Online.