The office of Iraqi Prime Minister Muhammad Shia al-Sudani announced, on Saturday, three days of mourning in Iraq after the killing of Hezbollah leader Hassan Nasrallah in an Israeli raid on the southern suburb of Beirut on Friday.

The Lebanese Hezbollah confirmed, on Saturday, in a statement that Nasrallah had been killed, shortly after Israel announced that he had been killed in an attack on the southern suburb of Beirut that targeted the group’s central command headquarters, on Friday.

The Israeli army announced the killing of Nasrallah, and other leaders, in air strikes that targeted the southern suburb of Beirut, on Friday.

The Israeli army spokesman, Avichay Adraee, said that the army “eliminated Nasrallah, the official, Ali Karki, the commander of the southern front in Hezbollah, and a number of other leaders.”

He added, “Air Force planes, under precise intelligence guidance from the Intelligence Authority and the security establishment, raided the central headquarters of Hezbollah, which is located underground under a residential building in the southern suburb area.”

He continued, "The raid was carried out at a time when Hezbollah's leadership was present inside the headquarters."

Israeli Army Chief of Staff, Herzi Halevy, said: “This is not the last thing we have up our sleeve. The message is simple. Anyone who threatens the citizens of Israel, we will know how to reach him.”

Israel launched air strikes on the southern suburbs of Beirut and other areas in Lebanon, on Saturday, after it carried out a major attack on Hezbollah’s central command headquarters on Friday.

Witnesses told Reuters that they heard the sounds of more than 20 air strikes before dawn on Saturday and a number of others after sunrise. Plumes of smoke were seen rising in the sky of the southern suburb, which is controlled by Hezbollah.

Thousands of residents have fled the suburb since the attack occurred on Friday, and gathered in squares, parks and sidewalks in central Beirut and areas overlooking the sea.

The Israeli raids on Hezbollah's headquarters in the densely populated southern suburb of Beirut completely destroyed 6 buildings, according to a source close to the party.

Israeli army spokesman, Daniel Hagari, said that the army “carried out a precise strike on the central headquarters” of Hezbollah in the suburb.

According to Hagari, the headquarters “is located under residential buildings in the heart of the suburb.”

Nasrallah had been leading Hezbollah for decades, and oversaw its transformation into a military force with regional influence, and became one of the most prominent Arab figures, with the support of Iran.