The Janata Dal-United (JD-U) leader said his government set up a commission to conduct a fresh probe into the riots and reopened cases against the accused.
"Dozens of accused were sentenced by the court, thanks to the probe," Nitish Kumar said.
Stressing that the BJP government in Gujarat was solely responsible for the 2002 riots, he said: "It was the failure of the state government to check and control the riots in which hundreds of people were killed."
Nitish Kumar said his party JD-U was likely to ally with the Left parties to fight against the Congress and the BJP-led alliances.
