Mexican state police have arrested six police officers for the murder of Edelmiro Cavazos, a mayor whose high profile murder was publicly mourned by the president this week, the state governor told broadcasters on Friday.

"We have arrested suspected in the commission of the crime," said Rodrigo Medina, governor of the state of Nuevo Leon, where Cavazos was mayor of the small town of Santiago. Cavazos had been kidnapped on Sunday and his body found on Wednesday.

During the same press conference, the state's attorney, Alejandro Garza, said that the suspects were five state police and one traffic police officer. He did not name the officers, but said that one of them was a bodyguard who had been kidnapped at the same time as Cavazos but released shortly afterwards.

Four more arrests may take place shortly, he added.

Following Cavazos' murder, Mexico's President Felipe Calderon ordered the nation's interior minister, Jose Francisco Blake Mora, to review security in the area alongside the regional government. It is the second high-profile political murder this year.

In late June, gunmen killed Roldolfo Torre Cantu, a candidate for governor in northern Mexican state Tamaulipas.

In response to the earlier killing, Calderon called for a national debate on how to better tackle organized crime, which has been held all this month in the Campo Marte military base in central Mexico City.

During the debate, government officials revealed that more than 28,000 people had died during the nation's fight against organized crime, which has been a central plank of Calderon's policy since he took power in December 2006.