Hope and obstacles as Russia and Ukraine seek gas deal

MOSCOW/KIEV (Reuters) - A tentative agreement between the Ukrainian and Russian presidents has raised hopes of ending a dispute in which Moscow has halted natural gas supplies to Kiev, but several obstacles still have be overcome.

Movement on the gas row was the only sign of progress at talks between Vladimir Putin and Petro Poroshenko on Friday which failed to resolve differences over fighting in eastern Ukraine and a deep crisis in relations.