Each officer from the town of Ocampo was cuffed, disarmed, and interrogated by internal affairs officials of the Mexican Secretariat of Public Security.
They are being investigated for possible involvement in the assassination of local mayoral candidate Fernando Angeles Juarez on Thursday.

Fernando Angeles Juarez, a contestant in the Ocampo mayoral race  was gunned down outside his home on Thursday. His death has brought federal security investigating the town’s police dept

The 64-year-old anti-corruption campaigner was gunned down outside his home in Ocampo by unknown shooters.
Photos in local media show the officers lined on the floor lying face down with their hands cuffed behind their backs.
They were officially being investigated for potential violations of the police code of conduct but authorities didn’t give more details.

‘All of the officers are being interviewed in accordance with the law,’ a secretariat of Public Security statement said.
Following Mr Juarez’s murder, local authorities accused Ocampo’s public security secretary Oscar Gonzalez Garcia of being involved.
Local police officers prevented federal agents from arresting him on Saturday, leading to a standoff that saw the Federales back down.
They returned with reinforcements the next morning and detained Mr Garcia and the police who protected him.
Prosecutors suspect he and the officers of being connected to organised crime groups in Michoacan.
Ocampo is a rural township about 95 miles west of Mexico City best known for the Monarch butterfly wintering grounds that occupy part of the mountainous municipality. It also been plagued by illegal logging and gangs.
Fernando Juarez was running for mayor of the town on the platform of the state’s governing Democratic Revolution Party.

His party confirmed the assassination and called on the government to provide protection for election candidates.
Mr Juarez was just the latest victim in Mexico’s bloodiest-ever election campaign that has claimed the lives of more than 120 candidates, almost all in local contests.
Mr Lucatero was shot dead in the conflict-ridden rural town of Aguililla, where drug gangs and vigilantes are rampant, on the same day as Mr Juarez.
His nephew, in a tearful video message, claimed he had recently been intimidated by an armed group, and blamed the murder on his uncle’s opponent Osvaldo Maldonado, who quickly denied involvement.
Mexican security analyst Alejandro Hope said the level of violence could be explained in part by the record number of elections.
Gomez Lucatero’s tearful nephew posted a video online pointing at political opponent Osvaldo Maldonado, for his uncle’s murder. Maldonado denied the accusation in a Facebook post on Thursday

Mayoral candidate Oscar Gomez Lucatero’s nephew has publicly accused his uncle’s opponent Osvaldo Maldonado [photo], in his assassination. Maldonado has denied the allegations

With more than 3,400 local, state and federal posts at stake, there are more than 15,000 candidates hitting the campaign trail.
‘Secondly, this speaks to the changes in criminal groups. With the evolution of crime, it becomes much more important to gain control over territory, over local governments,’ he said, a local security analyst said.
In crimes like fuel theft, for example, local police can be valuable allies to act as look outs or cover up for illegal pipeline taps and illicit fuel warehouses.
Some gangs have even taken to extorting money from local governments by forcing them to sign inflated public works contracts.
Those concerns could lead the gangs to kill a candidate who rivals their favorite, or ones who refuse their demands.
Mexico is also more violent than it has been in decades with 25,339 people murdered last year.
More than 200,000 people have been killed since the government launched its militarised offensive against drug traffickers in 2006.