Canada is suspending its extradition treaty with Hong Kong in the wake of China’s move to impose national security legislation on the former British colony.

Canada is also halting exports of sensitive military gear to Hong Kong and updating its travel advisory for the city so Canadians will know how the law might affect them, the foreign ministry said.

“Canada is a firm believer in the ‘one country, two systems’ framework,“ Prime Minister Justin Trudeau said, referring to the semi-autonomous model adopted after Britain returned Hong Kong to China in 1997.

“We’re extremely concerned about the situation in Hong Kong,“ he told a press briefing.