MOSCOW, Nov 18 (Reuters) - Gazprom has sent a formal letter to Ukraine proposing either to extend a current gas deal or sign a new one-year agreement, the Russian gas exporter said on Monday .
It also said that it had offered to drop legal claims and counter-claims by both Ukraine and Russia as a pre-condition for the deal.
The current deal on Russian gas supplies to Ukraine and its transit via the country to Europe expires on Dec. 31. (Reporting by Vladimir Soldatkin; editing by Jason Neely)
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