By Gleb Gorodyankin and Vladimir Soldatkin MOSCOW (Reuters) - Russia plans to supply Syria with 200,000 tonnes of liquefied petroleum gas (LPG) per year via the Crimean port of Kerch, two trading sources told Reuters. The plans are a further sign of cooperation between the two countries despite hopes in the West that Russia might stop shielding President Bashar al-Assad from pressure to step aside. Moscow had been shipping significantly lower volumes of LPG to Syria via Kerch before Russia annexed the Crimea peninsula from Ukraine in March 2014.