(Reuters) – Ukrainian President Petro Poroshenko said on Thursday that Russian forces had entered his country and the military conflict was worsening after Russian-backed separatists swept into a key town in the east. Poroshenko said he was cancelling a visit to Turkey and conferring with defense chiefs because of the “rapidly deteriorating situation” in the eastern Donetsk region, “as Russian troops have actually been brought into Ukraine“. A NATO military officer said: “We assess well over 1,000 Russian […]