Hezbollah Secretary General Hassan Nasrallah is now speaking in Lebanon, marking his first public remarks since the Israel-Hamas war erupted.
Nasrallah called the October 7 Hamas attacks on Israel a "great, blessed operation."
In his speech on Friday, Nasrallah addressed speculation about whether Iran-backed factions were part of the attacks, saying that the planning and execution of the attacks were "100 percent Palestinian," adding that it did not bother Hezbollah that the operation was kept secret from them. Nasrallah said he understood Hamas' need for the element of surprise.
Nasrallah said October 7 caused a "political earthquake" in Israel and that it will have "lasting effects" on the conflict with Israel, adding his view that the attacks exposed the country's military weaknesses.
He added that the lives lost in Gaza, the West Bank and other fronts were "worthy sacrifices" because they established a "historic new stage" in the conflict.
Nasrallah said the United States sending "fleets of warships" to the eastern Mediterranean also exposes Israel's weaknesses and its reliance on allies.
The US has sent two carrier strike groups to the Mediterranean.
Nasrallah is speaking via video link from an undisclosed location, and the speech is being broadcast to a large crowd of supporters gathering in the southern suburbs of Beirut.
As the speech began, a CNN team on the ground in Beirut heard celebratory gunfire.
He has not spoken publicly in person since 2006, when a month-long war erupted between Lebanon and Israel.
His speech comes amid escalating skirmishes between his powerful, Iran-backed armed group and Israel, sparking concern of a potential broader regional war.