What were Hezbollah's reactions to Al-Arouri's assassination?

Senior Hamas official Saleh al-Arouri and six other members, including two commanders from the al-Qassam Brigades, were assassinated in a drone strike.
Lebanese Hezbollah movement vowed retaliation, describing the Israeli raid as a dangerous aggression.
Hezbollah cited a violation of Lebanon’s sovereignty, security, and resistance.
Israeli military spokesperson stated high readiness without acknowledging the strike.
Iran’s defense minister condemned the U.S.-backed Israeli regime for the assassination, predicting adverse outcomes for the U.S.
Hamas’ leader Ismail Haniyeh called it “a complete act of terrorism” and blamed Israel for expanding the scope of aggression.

Why is this important?

The assassination of al-Arouri escalates regional tensions and could spur retaliatory actions, potentially widening the conflict.
It disrupts Hamas’ structure and impacts the balance of power within the organization.
Al-Arouri’s killing is seen as a direct challenge to Hezbollah’s sphere of influence and may test its promised response.
The event impacts ongoing dialogues and negotiations in the region, including ceasefire efforts.

Claims made by a single publication:

The US did not receive advanced notice of the attack, and Israel did not take public credit (Israel Hayom, IFP News).
Two US officials confirmed Israel was behind the strike (IFP News).
The assassination comes after the US announced it would pull one of its carrier strike groups from the region (IFP News).
Israeli media outlets framed the assassination as a decisive blow to Hamas and Hezbollah’s capacity and conveyed the event as a warning to the enemies of Israel (Ynet, Israel Hayom, N12).

Sources:

What were Hezbollah’s reactions to Al-Arouri’s assassination?