Norway could increase its gas supplies to Europe but would not be able to replace Russian gas, CEO of Norwegian gas company Statoil Helge Lund said.
Norway is Europe's second biggest gas supplier after Russia.
Russian state-controlled Gazprom cut off gas supplies to Ukraine over a price dispute, saying there was "not insignificant" risk for Russian gas transit to the EU.
Gas flows to Europe have been stable so far since Gazprom cut-off its supplies to Ukraine.
More top news
Leicester City have sacked manager Claudio Ranieri less than nine months after he guided them to a historic Premier League title
Around 40 people were in the sports hall at Southwood Middle School in Milton Keynes when the 8ft by 5ft ceiling caved in.
Shaun Walmsley, 28, is on the run after two armed men helped him escape during an escorted hospital visit.