Russia's border guards say Ukrainians flee, see signs of 'humanitarian catastrophe': TASS

MOSCOW (Reuters) - Russia's border guard service said on Sunday some 675,000 Ukrainians had left for Russia in January-February this year and that there were signs of a "humanitarian catastrophe", Russian state news agency Itar-Tass said. "If 'revolutionary chaos' in Ukraine continues, hundreds of thousands of refugees will flow into bordering Russian regions," Tass quoted the service as saying. (Reporting by Katya Golubkova, editing by Elizabeth Piper)