UPDATE 1-Rosneft may back out of Morgan Stanley oil unit deal- sources
September 25, 2014 at 07:40 AM EDT
LONDON, Sept 25 (Reuters) - Rosneft, Russia's biggest crude oil producer, may back out of a deal to buy Morgan Stanley 's oil trading unit because Western sanctions make it virtually impossible to finance day-to-day operations, three sources close to the state-controlled company said.