A prosecutor who was found dead after having alleged a cover-up in the investigation of Iran over the 1994 bombing of a Jewish community center.

Nisman’s body was discovered in his apartment, a handgun nearby, hours before he was due to explain his allegations at the Argentine parliament on Monday, authorities said. A formal ruling on the cause of his death is pending.

Israel’s Foreign Ministry mourned Nisman’s death “in tragic circumstances.”

In a statement, the Israeli foreign ministry said Nisman was a “brave and prominent jurist who fought ceaselessly for justice (and) worked with great resolve to expose the identities of those who carried out the terrorist attack and those who sent them. The State of Israel voices hope that Argentine authorities will continue with Nisman’s activities and make every effort to exact justice on those responsible for the terrorist attacks in Argentina.”

Alberto Nisman