The Trump administration will ban imports of Canadian dairy products, most alcoholic beverages and motorcycles, the White House announced Tuesday, marking a sharp escalation in the trade dispute between the neighboring countries.

The restrictions will take effect in three weeks, according to the White House. The move came hours after Canada imposed retaliatory tariffs on $20 billion worth of U.S. imports.

The latest action deepens a trade conflict between two of North America’s largest trading partners, with both governments imposing new measures despite their closely integrated economies and longstanding commercial relationship.

This is a developing story. Check back later for updates.