By Alexander TanasCHISINAU (Reuters) - A senior official of Moldova's pro-European government said on Wednesday that his latest talks with the pro-Russian separatist Transdniestria region had been "quite difficult" as tension rises in the three-decade-old standoff. The region split from Moldova before the collapse of Soviet rule and fought a brief war against the newly independent state lying between Ukraine and Romania. Moldova's deputy prime minister, Oleg Serebrean, said the latest talks between the sides on Tuesday, in Transdniestria's main town of Tiraspol, had focused on the new tax regime. One-on-one talks with Transdniestria are held under the auspices of the 57-nation Organisation for Security and Co-operation in Europe, which has been mediating for decades. They replaced a longstanding "5+2" format in which Russia, Ukraine and the United States participated, along with observers from the EU and the United States.

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Persons: Alexander Tanas CHISINAU, Transdniestria, Oleg Serebrean, Serebrean, Maia Sandu, Moldolva, Sandu, Moldova's, Alexander Tanas, Ron Popeski, Leslie Adler Organizations: European Union, EU, Russian, Transdniestria, Organisation for Security, United Locations: Moldova, Ukraine, Romania, Russian, Transdniestria, Soviet, Transdniestria's, Tiraspol, Chisinau, Moscow, Cyprus, Russia, Europe, United States