|A weapon was found next to Mr Nisman's body, |
but the circumstances surrounding his death remain a mystery
Alberto Nisman was investigating the 1994 bombing of a Jewish centre in Buenos Aires in which 85 people died.
On Wednesday, he accused the president of involvement in a plot to cover up Iran's alleged role in the bombing.
The president's spokesman dismissed the allegations as "ridiculous".
Mr Nisman, 51, was found dead by his mother in the bathroom of his home.
Investigating prosecutor Viviane Fein said he had been shot once. She said an autopsy was under way and its results would be made public later on Monday.
Ms Fein ruled out burglary as a motive. "It [the apartment] was in perfect condition, there was no mess, nothing was missing," she said.
She also said that no suicide note had been found in the flat.
|Forensic scientists of the Argentine Federal Police arriving at the flat where |
Argentine prosecutor Alberto Nisman, 51, was found dead on 19 January, 2015
Really? Bodyguards phoning him? Shouldn't they be close enough to talk to him without phones?
Concerned about his welfare, they fetched Mr Nisman's mother and tried to enter his apartment, the statement said.
They found the door locked from the inside with a key still stuck inside.
After a locksmith gained access, they found Mr Nisman's body in the bathroom.
According to the statement, a gun and a cartridge shell were found next to his body.
Mr Nisman was due to give evidence at a congressional committee hearing on Monday to outline his accusations against President Fernandez and other officials.
|18 July 1994 - rescue workers searching|
the rubble of the Argentine-Israeli Mutual
Association community centre after a
car bomb exploded.
85 people died in the bombing
He said that he had issued a request that a judge question the president and the foreign minister "for being authors and accomplices of an aggravated cover-up and obstruction of justice regarding the Iranians accused of the Amia [Israeli-Argentine Mutual Association] terrorist attack".
The car bombing of the seven-storey building was the worst terrorist attack in Argentina's history.
In 2007, Argentine prosecutors accused Iran of planning and financing the attack, and the Lebanese militant group Hezbollah of carrying it out.
Iran dismissed the allegations as "baseless".
So far, no-one has been convicted in connection with the Amia attack.
Last July, at events marking the 20th anniversary of the bombing, Pope Francis demanded justice for the victims.
In a recorded video to mark the anniversary, the Pope described the attack as an "act of madness".