KIEV, June 23 – Russian crude oil supplies to Europe via Ukrainian pipelines haven’t been affected by a management dispute at UkrTransNafta, the state-owned oil shipper, a company spokesman said Tuesday.

UkrTransNafta, which is moving up a bulk of Russian oil to Europe, has been embroiled in the management dispute for the past two days as two rival business groups have been apparently trying to strengthen their control over the company.