Kamaljit Arora, 45, was charged with two counts of first-degree murder in the deaths of his daughter Anzel, 13, and son Aaron, 11, in the Montreal suburb of Laval.
In addition, he faces a charge of strangling his wife.
Laval Mayor Stéphane Boyer paid tribute to Anzel and Aaron in a Facebook post and placed flowers on a growing memorial outside their home.
“I struggle to find the words to describe the infinite sadness of this tragedy, of which we still have so few details and which is already so revolting,” Boyer wrote. “That innocent lives are taken in such a horrible way is beyond comprehension and deeply shakes all Laval residents.”
He offered his condolences to the mother and older sister of the two young victims.
None of the allegations have been proven in court of law.