The municipal police chief was killed along with his guards during the attack.
According to the State Prosecutor's Office, at least five officers were subdued and tied up by the gunmen and then executed, Anadolu Agency reported.
The Secretary of Public Security of Coyuca de Benítez, Alfredo Alonso Lopez, was found among the dead, as well as the Director of Public Security, Honorio Salinas.
Initial reports said the armed group ambushed the officers while they were monitoring the area.
The massacre was carried out between Acapulco and Zihuatanejo, which are major tourist hotspots in Guerrero.
It happened a month after the killing of other security officials in the state.
On Sept. 12, the head of the Attorney General's Office in Guerrero, Fernando Garcia, was shot dead in the state’s capital Chilpancingo, days after the murder of public prosecutor Victor Manuel Salas.
AMK/PR