(CNNMoney) - The Trump administration is picking another trade fight with Canada, this time over wine.

Trade tensions between the North American neighbors have escalated in recent months, with spats over jet planes, timber and dairy. President Trump, meanwhile, has thrown into doubt the future of NAFTA, the free trade deal that links the two countries and Mexico.

In a filing with the World Trade Organization -- made public on Monday -- the U.S. accuses Canada of unfair restrictions on the sale of foreign wine in British Columbia, Canada's westernmost province and a big wine-producing region.

Under rules introduced two years ago, the only wines retailers in British Columbia can sell on regular grocery store shelves are ones made in the province. Imported wines have to be sold in a separate "store-within-a-store."