Wailing supporters of Hezbollah have taken to the streets around the world to grieve and condemn Israel following news of the death of leader Hassan Nasrallah.
Demonstrators gathered in Beirut and Tehran with posters of the late Shia cleric after Hezbollah confirmed his death today.
Iran has led international condemnation for the killing, claimed by Israel after heavy bombardment of Hezbollah headquarters in Beirut on Friday.
Irans Supreme Leader pledged that all regional resistance forces would support the terrorist group as the country demanded a strong response to the attack.
In his first comments since Israel claimed to have killed Nasrallah, Ayatollah Ali Khamenei said, it is the duty of all Muslims to stand by the people of Lebanon and Hezbollah against the occupier, evil and suppressor regime of Israel.
A group gather carrying Nasrallahs poster and chanting slogans in Beirut on Saturday
Women demonstrate with pictures of the late Hezbollah leader in Palestine Square, Tehran
A woman reacts to the news of the death of Hezbollah leader Hassan Nasrallah in Beirut today
A protester holds a picture of Nasrallah at a rally in Tehran today
Kashmiri Shiite Muslims shout anti-Israel and anti-U.S. slogans during a protest against the killing of Hezbollah leader Hassan Nasrallah, in Srinagar, Indian controlled Kashmir
Kashmiri Shiite Muslims rally against the killing of Hassan Nasrallah today
File. Hezbollah confirmed the death of secretary-general Hassan Nasrallah (R) on Saturday
Israel continued strikes in Lebanon on Saturday (Pictured: Khiam town of Nabatieh)
Smoke rises from the rubble of a building that which levelled in overnight Israeli bombardment
Flames rise after an Israeli airstrike in the southern suburbs of Beirut, Lebanon this morning
Hezbollah, a proxy group propped up by Iran, received outpourings of support from its allies in the Middle East upon news of the death of its secretary-general.
Irans Supreme Leader pledged that all regional resistance forces would support the group as the country demanded a strong response to the attack.
In his first comments since Israel claimed to have killed Nasrallah, Ayatollah Ali Khamenei said; It is the duty of all Muslims to stand by the people of Lebanon and Hezbollah against the occupier, evil and suppressor regime of Israel.
In a statement read on state TV, he added that all regional resistance forces support and stand beside Hezbollah.
Irans First Vice President Mohammad Reza Aref said Saturday that the killing of Hezbollah chief Hassan Nasrallah in an air strike in the Lebanese capital will bring about Israels destruction.
We warn the leaders of the occupying regime that the unjust bloodshed... especially of Hezbollahs secretary general, martyr Seyyed Hassan Nasrallah, will bring about their destruction, Irans ISNA news agency quoted Aref as saying.
Tensions are expected to escalate with the reported death of a senior general in Irans Revolutionary Guards Corps, alongside Nasrallah.
General Abbas Nilforoushan, deputy commander of Guards operations, was killed in Israels attack on Lebanon that assassinated the Hezbollah chief, said the official IRNA news agency, giving no further details.
And Iran Air has cancelled all flights to Beirut until further notice, the airlines spokesman told local media including the Tasnim news agency on Saturday.
Sources from with Iran have said they are in constant contact with Hezbollah and other regional proxy groups to determine the next step.
Yemens Houthis said today that the killing of Nasrallah would strengthen their determination to confront the Israeli enemy.
The martyrdom of... Hassan Nasrallah will increase the flame of sacrifice, the heat of enthusiasm, the strength of resolve, said a statement from the leadership council of the Iran-backed Huthi rebels, vowing to achieve victory and the demise of the Israeli enemy.
The resistance will not be broken, and the Jihadist spirit of the Mujahideen brothers in Lebanon and on all fronts of support will grow stronger and bigger.
Other Shia communities aligned with the Iranian regimes ideology or Hezbollahs role in Lebanon have been slowly amassing support for confrontation with Israel in recent days.
Iraq declared three days of mourning in light of Nasrallahs death, on Saturday.
The Iraqi Resistance Coordination Committee, a group comprised of Iranian-backed Iraqi militias, convened last Sunday to discuss possible action over Israels operations in Lebanon.
American interests in Iraq and the region will be legitimate targets for the resistance, the group warned.
The discussion heard that the Aqaba-Basra oil pipeline could drag Iraq towards normalisation with Israel.
The group has previously claimed responsibility for bombing areas in Israel and US bases across the Middle East over the war in Gaza, per Middle East Monitor.
Iraqi volunteers in predominantly Shiite Basra also queued to register their names in support of Hezbollah following a call from the Jihad and Construction Movement on Friday.
Today, Irans Supreme Ayatollah Ali Khamenei (pictured) called on Muslims to confront and assist the wicked regime of Israel with whatever means they have
Syrians gather in the rebel-held northwestern city of Idlib in the early hours of September 28 following news claiming the death of Lebanons Hezbollah chief Hassan Nasralla
Syrians wave flags and take videos as they gather following the news of the Hezbollah leaders death today
A woman clad in a black chador chants slogans during an anti-Israel protest after the death of late Hezbollah leader Hassan Nasrallah in Palestine Square in Tehran
Iraqi volunteers gather to register their names to support Lebanons Hezbollah on Friday
People in Basra responded to a call from the Jihad and Construction Movement on Friday
A woman reacts after hearing the news of the death of Nasrallah in Beirut
Beirut. Nasrallah had been instrumental in Hezbollah politics over three decades
People take part in an anti-Israel protest after the death of Nasrallah in Tehran, 28 September
A protester holds a picture of Nasrallah during a rally in Tehran today
A man looks at a damaged building at the site of an Israeli airstrike in Choueifat, southeast of Beirut, today
Israel, meanwhile, quickly defended its actions in Lebanon this afternoon as its allies reiterated calls for de-escalation.
The IDF defended their ongoing strikes into Lebanon, claiming Hezbollah was planning its own October 7.
Spokesperson Daniel Hagari said they took out the commander when he was in Hezbollahs central headquarters.
He said: Hassan Nasrallah had the blood of thousands of men, women, children on his hands. Israeli, Jews. Jews across the world. Lebanese. Americans. British. French. Syrians, and other countless victims across the middle east and beyond.
He continued: Hezbollah has openly declared that it has a plan to carry out its own October 7 massacre on Israels northern border, but even in a larger scale. Hezbollah has been planning to do this in northern Israel, what Hamas did in southern Israel on October 7 - invade Israel, infiltrate communities and massacre innocent civilians.
Hassan Nasrallah, the leader of an evil terrorist organisation, the senior terrorist eliminated with him, and the central headquarters were a legitimate military target under international law.
Hagari added that Israel had tried to minimise casualties while Hezbollah used civilians as human shields, saying that their war is not with the Lebanese people.
Israels allies overseas have been critical of operations in Lebanon, with dozens killed and thousands wounded.
France and the US have been trying to hash out a three week ceasefire deal, as yet dismissed by Israel.
Hezbollah did not comment on the proposals.
Britain continues to advise against travel to Lebanon, urging people to find routes home.