FACTBOX: Countries affected by Russia-Ukraine gas dispute

(Reuters) - Ukraine's state energy company Naftogaz said on Wednesday that all Russian gas supplies to Europe via Ukrainian territory had halted at 0544 GMT (12:44 a.m. EST) in a pricing dispute.

Following are summaries of the gas supply situation in European countries affected by the action.

AUSTRIA

Gas flows stopped on January 7. Russia supplies 51 percent of Austria's gas.

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

The company has about 1.75 billion cubic meters of gas in storage, enough to supply Austrian household demand for three months during the winter.

GERMANY

E.ON Ruhrgas said gas shipments to Europe via Ukraine had been massively reduced since early on Tuesday and expects gas transit into Germany via Czech Waidhaus border point to stop entirely during the day.

Germany receives more than 40 percent of its gas from Russia. Energy firms warned of gas shortages if the dispute lasted much longer and sub-zero temperatures endured.

ITALY

Russian gas imports via the TAG pipeline were substantially interrupted from 1 a.m. on Wednesday.

Russia supplies around 31 percent of Italy's gas imports, or about 60 million cubic metres a day.

Italy has enough gas reserves to last several weeks, according to Industry Minister Claudio Scajola.

Italy has no reasons for concern regarding its energy supplies over the next few weeks in the wake of the gas dispute between Russia and Ukraine, the chief executive of oil and gas company Eni, Paolo Scaroni, said on Tuesday.

Scaroni said that since the first gas crisis between Russia and Ukraine at the start of 2006, Eni had put in place a policy of diversifying gas supplies and boosting gas storage.

FRANCE

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

France imports 15 percent of its gas supply from Russia. It does not rely on gas in the same way as Germany or Italy because 80 percent of its electricity is produced by nuclear energy.

HUNGARY

Hungary limited the natural gas consumption by industrial users after gas shipments via Ukraine stopped. Supplies via a pipeline from Austria were also uncertain.

Consumption by the biggest users was limited late on Tuesday and restrictions were extended to a wider circle of industrial consumers at 0700 GMT on Wednesday.

CZECH REPUBLIC

Main transit pipeline from Russia to the Czech Republic and Western Europe was halted from midnight.

SLOVAKIA

Gas supplies from Russia halted overnight.

Slovakia has declared a state of emergency over the drop.

BOSNIA

Russian deliveries stopped on January 6. Bosnia consumes around 350 million cubic meters of gas annually, most of it from Russia. It has no reserves of gas.

Consumption in the past two days rose to 1.6 million cubic meters because of low temperatures.

SERBIA

Supply from Russia was cut off on January 6. Serbia imports 92 percent of its gas from Russia via Hungary and Ukraine. Serbia has natural gas reserves of 100 million cubic meters, which could last for about 10 days under normal daily consumption of nine to 10 cubic meters.

BULGARIA

All Russian gas supplies via Ukraine to Bulgaria were halted on Tuesday, Bulgaria's economy ministry said.

The Neftochim Burgas refinery, controlled by Russia's LUKOIL, halted all exports of heavy fuel after a cut in Russian gas supplies prompted a switch to oil.

POLAND

Russian deliveries via Ukraine halted on January 7. Poland receives about 60 percent of its gas from Russia.

Imports continue via Belarus.

The government has approved a motion to cut gas supplies to industrial clients, the deputy prime minister said.

SLOVENIA

Russian supplies stopped from midnight. Slovenia receives about 55 percent of its gas from Russia. Deliveries to customers have not been disrupted.

CROATIA

Russian flows halted again late on January 6. Croatia consumes about 12 million cubic meters of gas each day during winter. It produces 4.8 million cubic meters and imports the remainder from Russia.

TURKEY

Russian gas supplies from a western pipeline passing through Ukraine have been cut, Turkey's Energy Minister Hilmi Guler said on Tuesday. The country raised supplies of Russian gas delivered via a pipeline under the Black Sea.

GREECE

All Russian gas supplies via Ukraine to Greece were halted on Tuesday, Bulgaria's economy ministry said. However, Turkey said the shortfall had not affected its gas exports to Greece.

MACEDONIA

All Russian gas supplies via Ukraine to Macedonia halted on Tuesday, Bulgaria's economy ministry said.

ROMANIA

All Russian gas supplies to Romania were cut early on January 7. Underground storage and gas production by Romgaz and Petrom were being used to make up for the shortfall. Romania, less reliant on Russian gas than other ex-communist counterparts, produces around 65 percent of its annual domestic consumption and imports around a third from Russia.