Ukrainian troops near the front line said Russia was bombarding access roads to slow the Ukrainian assault, which has shifted momentum after months of slow Russian gains in Europe's deadliest ground combat since World War Two. Alberta wildfires hit gas flow out of Canada to US, spiking prices Alberta officials on Thursday warned more wildfires could spread in next few hot and dry days, even as firefighters make progress in tackling widespread blazes that have slowed the outflow of natural gas from Canada into the United States, spiking prices.