Buenos Aires, Argentina: Argentine prosecutor Alberto Nisman drafted an arrest warrant for President Cristina Kirchner which was recovered from the trash at the investigator's apartment following his mysterious death last month, officials said Tuesday.

Prosecutor Viviana Fein -- who on Monday had denied the existence of the document -- admitted the 26-page warrant for Kirchner's arrest, dated June 14, 2014, was discovered after Nisman's death from a gunshot wound on January 18.

Nisman, 51, died on the eve of an appearance before Argentine lawmakers in which he was expected to accuse Kirchner of mounting a cover-up over the 1994 bombing of a Jewish centre which left 85 people dead and 300 wounded.

It was the worst terror strike on Argentina's soil in its modern history.

In a criminal probe released four days before his death, Nisman alleged Kirchner and other officials had struck a deal with Iran aimed at shielding Tehran officials linked to the 1994 bombing in exchange for lucrative trade agreements.

Tuesday's revelation that Nisman had considered seeking the arrest of Kirchner provided a fresh twist to a scandal which has captivated Argentina since the prosecutor's death at his home in Buenos Aires.

News of a possible arrest warrant being discovered was first reported by the Clarin newspaper on Sunday.

Existence of the draft warrant was swiftly denied by Fein, who is investigating Nisman's death, and cabinet chief Jorge Capitanich, who branded the report ‘rubbish’ before theatrically tearing up a copy of the Clarin story before television camera crews.

However Fein was forced into an embarrassing U-turn on Tuesday, admitting that she had made an ‘honest mistake’ by denying the warrant existed.

According to polls, some 70% of the population believe they will never know the truth behind Nisman's death.