Vano Noniashvili, a spokesman for President Mikheil Saakashvili, said the officers would be handed over to the OSCE's chairman in office, Karel De Gucht, who is scheduled to arrive in Tbilisi later today for talks with Saakashvili.
Noniashvili said the four would be handed over in a formal ceremony after those talks.
OSCE spokesman Alexander Nitzsche confirmed the Georgian announcement.
"The OSCE chairman in office is going to meet with the Georgian foreign minister, [Gela] Bezhuashvili, as well as the Georgian president, [Mikheil] Saakashvili," Nitzsche said. "And that is going to be followed -- we expect -- by a handover of the Russian servicemen that currently are the source of the dispute between Russia and Georgia."
Meanwhile, Russian news agencies say the Russian Transport and Communications ministries have ordered all postal, air, rail, road, and sea links with Georgia suspended.
The arrest of the four Russian officers on spying charges last week triggered the most serious crisis between the two nations in years.
Russian President Vladimir Putin has accused Georgia of "state terrorism with hostage taking." Russia also has withdrawn most of its diplomatic staff from Tbilisi and placed its two military bases in Georgia on alert.
Saakashvili has said Russia was "overreacting."
(Reuters, AP, Ekho Moskvy, ITAR-TASS)