FACTBOX: 18 countries affected by Russia-Ukraine gas row

(Reuters) - Russian gas flows via Ukraine were halted for a third straight day on Friday, hitting 18 countries ranging from large European Union members including Germany to small ex-Soviet Moldova.

AUSTRIA - About 60 percent of annual demand is met by Russian gas*

Gas flows stopped on January 7.

No rationing of supply to Austrian firms before next Monday.

Oil and gas group OMV was drawing on reserves, domestic production and other imports to guarantee supply.

GERMANY - Russian gas meets about 42 percent of annual demand*

German energy groups E.ON AG and Wingas are relying on gas stores and a transit route via Poland. Gas shipments to Europe via Ukraine have been massively reduced since early on Tuesday, and no Russian gas has arrived into Germany via the Czech Waidhaus border point for a third day.

Energy firms warned of gas shortages if the dispute lasted much longer and sub-zero temperatures endured.

TURKEY -- Russia meets about 67 percent of annual gas demand*

Production at three Turkish power stations stopped on Thursday. Russian gas supplies from a western pipeline passing through Ukraine were cut on Tuesday. The country has raised supplies of Russian gas delivered via a pipeline under the Black Sea. Gazprom's Blue Stream pipeline to Turkey is working at full capacity of 45 million cubic metres (mcm).

Iran raised the amount of its daily supply volumes to Turkey to 18 million cubic metres from 12 million, following the partial cut off of Russian gas, an Iranian diplomatic source said on Friday.

GREECE -- Russia meets about 82 percent of annual gas demand*

All Russian gas supplies via Ukraine to Greece were halted on Tuesday. Turkey's gas exports to Greece were below the contract level with low pressure on the pipeline.

Greece, a latecomer to creating infrastructure to supply gas to households, is better placed to ride out the Russia-Ukraine gas crisis than some of its neighbors as the country continues to rely on oil for heating and power production.

According to the Greek gas company Depa, natural gas accounts for about 20 percent of Greece's energy needs, with about 9 million cubic metres per day needed to cover domestic demand. About 5-6 million cubic metres (mcm) come from Russia, via Ukraine and then Moldova, Romania and Bulgaria.

ITALY -- About 28 percent of annual demand for gas is met by

Russia*

Russian gas imports via the TAG pipeline were substantially interrupted from 1.00 a.m. on Wednesday, with supplies reduced by 90 percent. Italy has tapped its gas reserves.

Economic Development Minister Claudio Scajola said on Thursday Italy had enough gas stocks to last two months and see it through the winter.

FRANCE -- About 24 pct of annual gas demand is met by Russia*

Russian shipments dropped by more than 70 percent on January 6. French Energy group GDF Suez guaranteed supplies.

France does not rely on gas in the same way as Germany or Italy because 80 percent of its electricity is produced by nuclear power stations.

HUNGARY -- About 60 percent of annual gas demand is met by Russia*

E.ON Ruhrgas is to supply Hungary with 2.5 mcm of natural gas per day via a pipeline from Austria.

Hungary eased restrictions on some large industrial gas consumers from Thursday morning.

It plans to use some of its strategic gas reserves on Thursday to ensure supplies to household and most industrial users.

Hungary is to provide Serbia with 2 million cubic metres of gas on Friday after starting to do so on Thursday because of milder weather and lower household consumption.

CZECH REPUBLIC - About 80 percent of annual gas demand is met by Russia*

The main transit pipeline from Russia to the Czech Republic and Western Europe was shut on January 7.

No customers have suffered any shortfall, said the dominant gas firm RWE Transgas, a unit of Germany's RWE.

The firm said it had about 1.9 billion cubic metres of gas in storage, enough to supply Czech firms and households for several weeks, unless the weather was extremely cold. There were no plans at present to reduce supply to industrial customers.

Consumption is about 50 million cubic metres on an average winter day. The country now imports around 17 million cubic metres per day from Norway and Russia via Germany, more than standard shipments coming through the link only from Norway.

The Czech Republic will provide about 4 million cubic metres of gas per day to Slovakia, Industry and Trade Minister Martin Riman said on Friday. It would come from a Czech storage facility in Slovakia and may start flowing later on Friday.

SLOVAKIA - About 100 percent of annual demand is met by Russia*

Slovakia declared a state of emergency after Russian supplies stopped on January 7. It may restart a nuclear power plant it shut down to comply with the EU accession agreement if Russian gas supplies remain halted for a longer time.

The Slovak gas transit and distribution company SPP said it had reduced supplies to around 1,000 Slovak companies, forcing major companies to reduce production. SPP is delivering gas from its storage facilities to households, hospitals and schools.

The Czech Republic said on Friday it would provide Slovakia with about 4 million cubic metres of gas per day, possibly starting later on Friday.

Slovakia said it wanted to secure delivery of 8-10 million cubic metres from sources other than Russia.

BOSNIA - Nearly 100 percent of Bosnia's gas comes from Russia*

Russian deliveries stopped on January 6. Bosnia uses around 350 million cubic metres of gas annually. It has no gas reserves.

Natural gas accounts for around six to eight percent of Bosnia's energy use, Bosnian energy officials say. Tens of thousands have been left without heating and some factories have closed. In Sarajevo, citizens that lived without heating during the 1992-95 war have rushed to buy electric heaters.

An alumina plant, two Slovak car factories, a steel mill and a Hungarian car maker have had to shut.

Bosnia is seeking natural gas from Germany's E.ON.

SERBIA - About 87 percent of annual gas demand is met by Russia**

Supply from Russia was cut off on January 6 and the country ran out of gas. Many thousands of people were without heating and some health clinics and hospitals have closed.

Natural gas accounts for 15 percent of its annual fuel use according to the Serbian energy ministry.

But tens of thousands of Serbian homes regained gas heating on Thursday after Germany and Hungary started supplying five million cubic metres of natural gas a day. Officials said 170,000 Serbian households had no gas heating as of Thursday, but many of those were expected to be back to normal on Friday.

Hungary's HOL said it would provide Serbia with 2 million cubic metres of natural gas on Friday.

E.ON Ruhrgas would provide Serbia with further 2.7 million cubic metres, Energy Minister Csaba Molnar said on Friday. President Boris Tadic said on Friday Serbia was negotiating a deal for an additional 2-3 million cubic metres from Austria.