Amid warnings of price increases, Canada moved quickly to retaliate, China said it had planned countermeasures, and Mexico said it would soon unveil its response.

Canada’s prime minister and Mexico’s president ordered retaliatory tariffs on goods from the U.S., following through with their threats after U.S. Donald Trump sparked a trade war by imposing sweeping tariffs on imports from Canada,

The move likely will trigger retaliation and risk igniting a trade war that could cause broad economic disruption for all countries involved.