KIEV, Nov. 28 - Ukraine will make sure that natural gas supplies from Russia to the European Union continue without interruption even if Kiev and Moscow clash over gas debts, a top aide to President Viktor Yushchenko said Friday.

Bohdan Sokolovskiy, the top energy security advisor to Yushchenko, said the president has been “actively” involved in negotiations seeking to avert the clash over $2.4 billion gas debt.