Public Safety Minister Marco Mendicino is calling on Twitter Canada to address a tweet sent to Canadian Medical Association president Dr. Katharine Smart, saying the tweet “poses risks to the health and safety of health-care workers.”

His letter, addressed to Twitter Canada’s managing director Paul Burns, is about a tweet sent to Smart on Dec. 22 by an account under the handle “@AsktheBrownDoc1.” 

“Are you scared you are next @KatharineSmart?” the tweet reads. “A group of us who can’t stand you have been seeing you and your family for weeks … and already have some great footage … just biding our time for the