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MANHATTAN (PIX11)- Republican candidate for New York City mayor Joe Lhota has released his scariest attack ad to date.

The ad is called ‘Can’t Go Back’ and it started airing in the city on Wednesday. It features video from the September 29th biker gang attack on an SUV on the West Side Highway.

The ad slams Democratic opponent Bill de Blasio saying electing him will raise crime in the city.

A spokesperson for the de Blasio campaign says Lhota is trying to use a fear tactic to divide New Yorkers.

Throughout his campaign, Lhota has been critical of de Blasio’s ideas to reform the NYPD.