Police departments in New York and several other cities were said to be operating on “high alert”, fearful of copy-cat attacks.
The NYPD has suspended all auxiliary patrols for the time being, and police unions have told officers to respond to every radio call with two cars and to not make arrests “unless absolutely necessary”.
Officials are also expecting protests in Milwaukee, Wisconsin, after prosecutors said they would not charge a police officer who shot a mentally-ill black man at least 14 times after they traded blows following the police officer’s attempt to search him.
Meanwhile, the family of officer Ramos joined community leaders near their home in Brooklyn for a prayer vigil on Sunday and a makeshift memorial has sprung up at the site of the shooting.