MOSCOW, Nov. 18 - Gazprom has sent a letter to Ukraine formally proposing either to extend a current deal supplying gas to the country for its own use and for transit to Europe or to sign a new one-year agreement, the Russian gas exporter said on Monday, Reuters reported.

The current 10-year agreement between Russia and Ukraine, which have been at loggerheads since Moscow annexed Crimea in 2014, expires on Dec. 31.