The Bronx DA is investigating claims of voter fraud in a hotly contested Democratic primary for the Assembly that was decided by two votes.

Following a hand recount, Assemblyman Victor Pichardo defeated challenger Hector Ramirez, a district leader, 1,888 votes to 1,886 votes, in the 86th District, covering University Heights, Fordham and the West Bronx.

Before the recount, Ramirez had led by six votes.

Ironically, Pichardo, by winning a special election, succeeded Assemblyman Nelson Castro, who was nailed for election fraud after nine voters were discovered registered at his one-bedroom apartment.

He later cut a deal with the feds and wore a wire to ensnare other officials engaged in corruption.

DA Robert Johnson has subpoenaed Board of Elections records relating to voters who submitted absentee ballots. Investigators also visited the homes of some voters, many of whom are Dominican immigrants.

“We’re looking into claims of voter fraud,” said Johnson spokeswoman Terry Raskyn.