MEXICO CITY - (AP) -- The governor of the central Mexican state of Morelos ordered the firing of all 552 state police officers Monday, several days after top police commanders were arrested on charges they provided protection for drug traffickers.

Gov. Sergio Estrada told a news conference that he would launch a complete restructuring of the so-called investigative police so that it has agents ``fully trained in criminal investigation . . . respecting a code of ethics in strict compliance with the law and human rights.''

The record of each of the dismissed officers will be investigated, said Estrada, who added that the new force would comprise officers graduated from the state police academy who will be aided by federal police forces.

The new members of the force will be subjected to regular lie-detector tests as well as psychological and drug and alcohol testing, he said.

The police department's former chief, José Agustín Montiel, and his operations director, Raúl Cortes, were arrested last week on suspicion of protecting a cell of the Juarez Cartel, so-named for the northern border city where the drug-trafficking organization is based.

Federal organized crime prosecutor Jose Vasconcelos said the two were part of a network of police officers who helped protect the cartel, which is led by Vicente Carrillo.

Vasconcelos said last week that the arrests of five other suspects were pending, but there have been no additional detentions announced.

The daily newspaper El Universal published a report Monday in which two witnesses supposedly interviewed by federal investigators linked the governor himself to drug trafficking organizations, an allegation he denied.

''They have to present some evidence to back up these allegations,'' he said. ``I am also capable of . . . making a lot of things up.''