On Friday an embassy car was stopped near the town of Gori 16 miles from Tskhinvali, the capital of the self-proclaimed republic of South Ossetia.
Yury Popov, the Russian ambassador at large and co-chairman of the Joint Control Commission on the Georgian-South Ossetian conflict resolution, and other officials, as well as RIA Novosti correspondent Natalya Ratiani are in the car.
Armed officers told the people in the car to produce their identification papers and said they wanted to search the car despite the protests of the Russian diplomats.
"Under the Vienna Convention [on Diplomatic Relations], diplomatic mission cars are not subject to searches," Yury Popov said.
Georgian military police officers also demanded that the people in the car produce written permission from the Georgian authorities to enter Tskhinvali and asked for their mobile phones.
On Friday, Georgian military police also tried to search the Russian Embassy car. Georgia said it had not been informed about the Russian ambassador at large's visit, although the Russian Embassy said it had informed the Georgian Foreign Ministry.
Georgia said the detention was "a routine check to find out who was heading for the conflict zone" carried out in the interests of the Russian delegation's security due to increased tensions in the region.
A bomb exploded in Tskhinvali Friday, killing two people and injuring three.
