Night of violence in South Ossetia claims six
Earlier, five South Ossetians and a peacekeeper from a North Ossetian battalion were killed and at least twelve others were wounded.
South Ossetia says violence erupted when Georgian snipers killed three people.
It then escalated into mortar fighting.
Eduard Kokoity, the President of the self-proclaimed republic, said his military forces were ready to respond and would retaliate against any further aggression from the Georgian side.
Meanwhile, Tbilisi claims the escalation of tension occurred after South Ossetians attacked a Georgian patrol with a roadside bomb and shelled Georgian positions on the de-facto border.
South Ossetia declared independence from Georgia in the early 1990s amid violent conflict between ethnic Georgians and South Ossetians.
It has not been recognised by the international community.