Mexico City  - Mexico City Mayor Marcelo Ebrard said Tuesday that he has accepted the resignation of city police boss Joel Ortega, over the tragic police raid on a disco that left 12 people dead in a stampede on June 20.

Ebrard said the city's Attorney General Rodolfo Felix Cardenas tendered his resignation too, although he did not say whether it had been accepted.

"I acknowledge that we are faced with a major event," Ebrard said.

He was acting on a report from Mexico City's Human Rights Commission, which documented mistakes and abuse committed by police during the raid.

Ebrard said he accepted Ortega's resignation, although he was not in the disco at the time, because "a great institutional change is required."

Nine teenagers and three police officers died, most of them by suffocating, amid pushing and desperate shouts for air in the small nightclub, holding some 500 people at the time.

Mexico City authorities made public two videos that showed police played an important part in the tragedy, because they blocked the door of the disco News Divine to prevent people from leaving during the raid to investigate reports of underage drinking and drug use.

Several young people were arrested, questioned by police and forced to be photographed naked.

Seventeen high-ranking police officials were fired for their roles shortly after the raid. (dpa)