The link is from a pro-Hezbollah source. Summary in my own words below.

• Hezbollah’s leader Hasan Nasrullah addressed in a speech Israel’s attack on Beirut, which killed civilians and assassinated Fuad Shukr, hezbollah’s most senior military advisor. Shukr is a founding member of Hezbollah.

• Nasrullah also addressed Ismail Haniya’s assassination in Iran, who was the head of Hamas, saying “Iran will not remain silent on this”.

• Israel had previously claimed the attack on Beirut is in response to an attack that killed civilians and children in the Golan heights, a territory of syria that Israel occupies, and Israel blamed hezbollah. Nasrullah rejected the claims - “we have the courage to admit if we made a mistake, but we reject the responsibility of this attack”. Nasrullah claimed that Israel’s attack is part of its war, rather than a response to the alleged attack.

• Nasrullah vowed to avenge the attack on Beirut, citing that Israel does not know which red lines they have crossed.

• Nasrullah said that Hezbollah has so far maintained a support front for Gaza, but that this attack has marked a “new phase” of the war.

• Nasrullah announced that the support front for Gaza against Israel will resume tomorrow, but that is completely separate from the response to the attack on Beirut. Israel must expect this attack anywhere in occupied Palestine, a full and real response rather than a symbolic one, he said.