Ukraine president Victor Yushchenko'sSpokeswoman Larisa Mudrak said President Viktor Yushchenko had been traveling to Lviv when his plane experienced unspecified technical problems.
She says the Tu-134 plane was forced to return to
The president and his delegation resumed their trip aboard another plane.
Prime Minister Yulia Tymoshenko's press service claimed that Yushchenko and his delegation commandeered a plane that was to take her to
Tymoshenko and Yushchenko were allies in the 2004 Orange Revolution, the mass protests that forced the annulment of fraudulent presidential elections and powered Yushchenko to win a rerun. But they have consistently jockeyed for influence since then.
Their alliance fractured last month, threatening the uneasy coalition government they had cobbled together, but Tymoshenko on Wednesday said she would accept his terms to revive cooperation.