Beknazarov said Tanaev is alleged to have transferred 40 million soms (about $1 million) to a private construction company owned by his son.
"We issued the [international arrest] warrant. [Former prime minister] Nikolai Tanaev transferred 40 million soms from the Social Fund though a private company run by his son," Beknazarov said. "He transferred [the funds for] pensions and benefits to the other [third] side by [his] own decision. The board of the government [a council of ministers] should have approved it. We found that the board didn't approve it. He [Tanaev] signed it [the decision about the transfer of the money] himself [without members of board]."
Tanaev could face up to eight years in prison if convicted.
Last week, Beknazarov announced that he had issued international arrest warrants for about 10 people, but gave few details.