Russia's Investigative Committee has requested that Baring Vostok Capital Partners founder Michael Calvey be moved to house arrest after two months in a Moscow jail in a closely watched case that's shocked investors.

Calvey's next hearing is scheduled for Thursday in Moscow, when the Investigative Committee's petition will be presented, court spokeswoman Yunona Tsareva said. Three other defendants linked to the case, including two Baring Vostok executives, saw their detentions extended by three months in court Wednesday, she said.

The fund welcomed investigators' motion on Calvey's detention and said it hoped "the court will give due consideration" to the request. It called the rulings on the other defendants "illegal and unjustified" and said they would be appealed.