BUENOS AIRES: An Argentine prosecutor found dead just hours before giving what was expected to be damning testimony against President Cristina Kirchner appears to have committed suicide, the nation’s top security official said Monday.

“All signs point to suicide,” said Argentine Security Secretary Sergio Berni following the death of Alberto Nisman, 51, whose body was found overnight in his apartment in the trendy Puerto Madero neighborhood of the capital.

Nisman, who accused President Cristina Kirchner of obstructing a probe into a 1994 Jewish center bombing, was found dead of a gunshot wound just hours before he was due to testify at a congressional hearing.

Officials said a .22-caliber handgun was found beside his body, which was found by his mother in the bathroom of his 13th floor apartment after his security detail was unable to contact him.

Nisman since 2004 had been investigating the 1994 van bombing of the building of the Argentine Jewish Charities Federation, or AMIA.

The bombing left 85 people dead and 300 others injured in the worst attack of its kind in the South American country.

Nisman had last week asked for an investigation into possible obstruction by Kirchner and was due to speak at a congressional hearing Monday to provide evidence of his assertions. He was also expected to accuse her Foreign Minister Hector Timerman.

The prosecutor has accused Iran of being behind the attack and said Kirchner hampered the enquiry to curry favor with the Islamic republic.

The government has categorically denied the accusations.

Nisman had also accused former president Carlos Menem (1989-’99) of helping obstruct an investigation into the bombing, which has never been solved.