KIEV, June 21 ??“ Turkmenistan warned it may stop selling natural gas to Russia within two months unless Russia agrees to a 50% price hike in development that could undermine stability of gas supplies to Europe.

Turkmenistan said Gazprom, Russia??™s state-controlled gas giant would have to pay $100 per 1,000 cubic meters of gas in the second half of the year, up from $65, to ensure steady supplies.