Ukraine Naftogaz says no delay in Russian gas bill

* Naftogaz says to make payment to Gazprom on time

* President says IMF funds could be used to pay

* President says Naftogaz could face $7.8 bln in fines

KIEV, Nov 6 (Reuters) - Ukrainian state energy firm Naftogaz will pay Russia's Gazprom (GAZP.MM: Quote, Profile, Research) for October gas by the end of the day, a spokesman said after Moscow and Brussels both raised concerns that bills would not be settled.

Naftogaz must pay about $460 million by Nov. 7. EU Commission President Jose Manuel Barroso urged Ukraine on Thursday to ensure timely payments and avoid rows with Russia that could lead to gas supply cuts to European consumers. [ID:nL5273482]

The EU receives about 20 percent of its gas from Russia through Ukrainian pipelines. A pricing dispute led to supply cuts impacting hundreds of thousands Europeans in January.

"We are working on the payments," A Naftogaz spokesman said. "We have no reason not to pay Gazprom."

President Viktor Yushchenko reiterated the stance he has assumed since his bitter rival Prime Minister Yulia Tymoshenko signed gas price deal with Moscow in January -- that Naftogaz will find it difficult to pay for the gas.