MOSCOW -- Russian blogger and opposition leader Aleksei Navalny was questioned by investigators in Moscow in connection with a probe into losses at a state-owned firm.
His lawyers said Navalny was not officially charged with any crime on July 30, but was asked to provide a voice sample to investigators, which he refused to do.
Navalny was asked to return to the Investigative Committee on July 31.
The Investigative Committee reopened a two-year-old probe against Navalny earlier this month.
According to investigators, a forestry firm in the Kirov region sustained losses of over 1 million rubles ($30,900) between April and August 2009 due to the actions of Navalny, who at the time was an adviser to the region's governor.
Navalny has denied the charges.
If found guilty, he could face up to five years in jail.
Navalny, 36, has twice served short jail terms for his role in protests against President Vladimir Putin.