The leader of the Shiite political and militant group
In a televised speech yesterday, Nasrallah said that no authority could arrest the "noble brothers," whose identities were not disclosed.
The speech was Nasrallah's first reaction to the accusations made last Thursday by the Special Tribunal for Lebanon, based in The Hague (Netherlands) and endorsed by the UN Security Council.
The Shiite group has criticized the court several times and promised retaliation.
The Prime Minister Rafik Hariri and 22 others were killed in February 2005 in the center of the capital, Beirut when a bomb was detonated at the passing of his entourage.
In Lebanon, Hariri is considered responsible for the country's economic recovery after the civil war that lasted 15 years. His death has divided the country.
Israeli `Conspiracy '
In his speech yesterday, Nasrallah rejected "any accusation empty" by the special court, saying they amount to an attack on Hezbollah.
He also said that the four members of the group are brothers "who have an honorable history in the resistance to Israeli occupation" and stated that the court is biased and is part of an Israeli conspiracy.
On Thursday, Attorney General of Lebanon, Saeed Mirza, said he had received the four charges and arrest warrants by a delegation of the court in Beirut.
Hours later, the Special Tribunal for Lebanon confirmed the charges, saying the judge "is satisfied that there is enough evidence to take the case to trial."
The court also announced that it would not reveal the identities of the accused.
Hariri's son and former Prime Minister, Saad, welcomed the charges and said it was a "historic moment" for Lebanon.