It also accused Hezbollah of sending supporters into the Christian neighborhood of Ain Al-Remmaneh where it says four residents were wounded before a shot was fired.
“I advise the Lebanese Forces party to give up this idea of internal strife and civil war,” said Nasrallah.
“You are wrong one hundred percent, your calculations are wrong. The region has never seen Hezbollah as strong as it is now.”
Despite his tough stand, Nasrallah dedicated a significant part of his speech to trying to reassure Lebanon’s Christians, saying Hezbollah was protecting their rights and is allied with the largest Christian party, the Free Patriotic Movement.
Lebanon’s Shiite Amal movement, a Hezbollah ally, said earlier that the Beirut violence was intended to reignite internal strife and threaten peace.
The seven victims were killed as crowds headed for a demonstration called by Amal and Hezbollah to protest against Bitar.
“What happened showed the Lebanese people the truth behind what these groups are doing in terms of trying to ignite internal strife and national division and threaten civic peace, and push the Lebanese back to the era of civil wars,” Amal said in a statement.
Amal, which is led by Lebanese parliament speaker Nabih Berri, one of the most powerful political figures in the country, urged the authorities to arrest all those responsible for the violence.
The inquiry into the Aug. 4, 2020 explosion, which killed more than 200 people and devastated swathes of Beirut, has made little headway amid pushback from political factions.
Prime Minister Najib Mikati told the Al-Modon newspaper on Monday that the government would not meet unless an agreement is reached concerning the investigation.
Mikati also said he was not planning to resign at the moment. “The country can’t be left in circumstances like this.”
Tensions over the probe have spilt over into cabinet, with ministers aligned with the politicians the judge was seeking to question demanding his removal.