NEW ORLEANS (AP) - An unspecified number of New Orleans police officers are on desk duty pending investigation of an attempted traffic stop that preceded a deadly car crash and fire.

  

Authorities said Friday it is looking into a possible violation of department vehicle pursuit policy.

  

A suspected stolen car crashed into a New Orleans salon Wednesday night, sparking a major fire. Two people in the car died Wednesday. A woman rescued from the building died of her injuries Thursday.

  

Police said Wednesday that the vehicle sped away after officers turned on their lights. Superintendent Shaun Ferguson says it initially appeared that officers turned off their lights and did not pursue the car.

  

Officers must get a supervisor's approval before undertaking a vehicle pursuit under a 2012 reform agreement with the U.S. Justice Department.