Heavy fighting has broken out in Georgia's South Ossetia region, shattering a two-day ceasefire.
Two Georgian soldiers were killed in the attack
Two Georgian soldiers died as their base in the village of Eredvi came under attack from South Ossetian separatist forces early on Monday.
The ceasefire was agreed on Friday between Tbilisi and South Ossetia, which wants to join Russia.
Georgian Interior Minister Irakli Okruashvili said there would be no more talks following the recent attacks.
Flying into Eredvi by helicopter to evacuate the wounded, he accused South Ossetia of double standards, saying the authorities in the region's main city Tskhinvali were clearly incapable of sticking to the ceasefire.
As part of the deal, the two sides had agreed to create additional buffer zones between their positions.
These would be patrolled by Russian peacekeepers and monitored by the Organisation for Security and Co-operation in Europe (OSCE).
But the ceasefire has now been violated for two nights in a row. On Saturday, the convoy carrying the defence ministers of both sides came under fire shortly after they had finished negotiating the terms of their ceasefire.
Population: About 70,000
Major languages: Ossetian, Georgian, Russian
Major religion: Orthodox Christianity
Currency: Russian rouble, Georgian lari
There were also reports on Sunday night of further fighting between villages close to the capital of the breakaway region, but there is no information yet on casualties.
The commander of Georgia's peacekeeping battalion in South Ossetia, Alexander Kiknadze, said Georgian villages in the region came under heavy artillery fire in the latest attack.
He told Georgia's Rustavi 2 television that his battalion returned fire and had inflicted casualties on the South Ossetian side.
But Irina Gagloyeva, a spokeswoman for the South Ossetian authorities, said Georgian forces were the first to fire.