The NYPD is stepping up measures in the wake of the attack on Dallas police.

At a news conference Friday, Mayor Bill de Blasio and Police Commission William Bratton said officers will double up on patrols for their safety and police presence will be increased at protests.

They say there is no credible threat against the police force or the city, and the steps were being taken as a precaution.

Gunmen in Dallas killed five officers and wounded seven others on Thursday during a protest over fatal police shootings of black men.

(AP)