Abidjan - Two Ivorian police stations and a paramilitary gendarmerie post were attacked by armed men late on Thursday in the south of Abidjan, witnesses and security sources said.
The attacks - which took place a few kilometres apart on targets in the Port-Bouet district - were the first in a month following a wave of violence in August against the security forces.
It was not immediately known if there were deaths or injuries in Thursday's attacks.
Ivory Coast, the world's largest cocoa producer and previously seen as one of Africa's calmest states, descended into crisis after 2010 elections.
Fighting broke out after strongman Laurent Gbagbo refused to step down in favour of his long-time rival and current President Alassane Ouattara, who was declared the election's winner.
The United Nations said about 3 000 people died in the violence.
Five months of unrest followed before Gbagbo was eventually arrested after forces loyal to Ouattara stormed his heavily fortified home with French and UN military backing.