Shut ports to Russia, Ukraine urges Europe

He added that Ukraine and Norway, Europe's second-largest gas supplier after Russia, had started talks over the supply of 5 billion cubic metres of gas for next winter.

"You can make a decisive contribution to the energy security of Europe by providing the necessary resources both to the countries of the European Union and to Ukraine," he said.

"We have already started the dialogue on the supply of about 5 bcm for the next heating season. I do hope this will be the basis for our long-time co-operation in this area."

The Nordic country exported 113.2 bcm of gas last year.