The International Skating Union says it will be "more vigilant in future" after complaints about frigid temperatures at the European Figure Skating Championships.

ISU president Ottavio Cinquanta says it's something new to host an event in such a cold venue as the Post Finance Arena. But the Italian says figure skating is a winter sport, and the ISU and Swiss organizers need not apologize.

Many athletes commented on the cold, and pairs skater Alexander Smirnov described it "like the Russian winter."

The unheated stadium was renovated for 105 million Swiss francs (110 Cda) - then $92 million (96 Cda) -  before hosting the 2009 world hockey championships.

In Bern on Thursday, it was minus-3 Celsius.