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By Natalia Zinets and Richard Balmforth KIEV, (Reuters) - German Chancellor Angela Merkel flew in to the Ukrainian capital on Saturday and said she wanted to help end a crisis over Ukraine which flared again after Russia sent a convoy of trucks into Ukraine without Kiev's permission. Many of the trucks had crossed back into Russia, helping ease the tension sparked by what Western governments said was the convoy's illegal incursion a day earlier. Making her first visit to Ukraine since the conflict broke out four months ago in the east of the country between pro-Moscow separatists and government forces, Merkel went into talks with Ukrainian President Petro Poroshenko. In brief remarks at the start of their talks, the German leader said she came to Kiev "in a difficult time which is focussed on the unity and territorial integrity of Ukraine." "I hope that we will be able to discuss bilateral problems and support from Germany as well as the path towards peace, which must be found," she said.