TORONTO (AP) — Prime Minister Justin Trudeau warned Friday his government could impose stricter restrictions on travelers at any moment in response to new, likely more contagious variants of the coronavirus — possibly making it mandatory to quarantine in a hotel at their own expense when they arrive in Canada. Trudeau said at a news conference that such measures could be imposed suddenly and bluntly warned against nonessential trips abroad. “No one should be taking a vacation abroad right now. If you’ve still got one planned, cancel it. And don’t book a trip for spring break,” Trudeau said. Canada already requires those entering the country to self-isolate for 14 days and to present a negative COVID-19 test taken within three days before arrival. The suggested measure would require isolating at a hotel rather than at home.