Russian prosecutors on Monday asked a court to send a former economic development minister to a high-security prison for 10 years.

Alexei Ulyukayev, the highest-ranking Russian official to have been arrested since 1993, was detained last year at the headquarters of Russia's largest oil producer, the state-owned Rosneft, after a sting operation by Russia's main intelligence agency. Ulyukayev denies the charges and says Rosneft's influential chief executive Igor Sechin has set him up.

The circumstances of the case have ignited speculation that Ulyukayev fell victim to a Kremlin power play by Sechin, a longtime associate of President Vladimir Putin.

A prosecutor on Monday in his remarks during cross-examination asked the court to find Ulyukayev guilty of extorting a $2 million bribe from Sechin and send him to a high-security prison for 10 years as well as fining him roughly $8.5 million.

Ulyukayev deserves such a harsh penalty because his actions "are undermining the authority of the government," the prosecutor told the court.

Prosecutors have said Ulyukayev was extorting a bribe from Sechin in return for giving the green light to Rosneft's purchase of another oil company.