We reported that story here last week.
Damian Pachter, who also holds Argentine-Israeli citizenship, said he had "quickly" fled Argentina fearing for his life following threats to his security.
"I'm leaving because my life is in danger. My phones are tapped," Pachter, a journalist with the Buenos Aires Herald, told the website Infobae.
The website carried a photograph of Pachter, wearing a cap and carrying sunglasses, at the airport before he boarded an Aerolineas Argentinas flight.
|Damian Pachter arrives in Israel|
"I'm going to come back to this country when my sources tell me the conditions have changed. I don't think that will be during this government," Patcher told Infobae.
State prosecutor Alberto Nisman was found dead in his apartment late on January 18, a gunshot wound to his head and a 22 caliber pistol by his side along with a single shell casing.
He had been scheduled to appear before Congress the following day to answer questions about his allegation that President Cristina Fernandez conspired to derail his investigation of the attack.
His death and a storm of conspiracy theories around it have rocked Argentina.
Argentina suspects rogue agents from its own intelligence services were behind Nisman's death.
The government says Nisman's allegations and his death were linked to a power struggle at Argentina's intelligence agency and agents who had recently been fired.
Argentine courts have accused a group of Iranians of planting the 1994 bomb, which killed 85 people.
Nisman had claimed that President Fernandez opened a secret back channel to Iran to cover up Tehran's alleged involvement in the bombing and gain access to Iranian oil needed to help close Argentina's $7 billion per year energy deficit.
Fernandez's government called the accusation absurd.