Human rights activist, Omoyele Sowore, collapsed during a confrontation with police officers during a Democracy Day protest at the Unity Fountain in Abuja.
The policeman had used tear gas to disperse those who had gathered to demonstrate against insecurity, economic hardship and poor governance.
The demonstrators were dispersed after security personnel deployed tear gas canisters in an apparent attempt to break up the gathering.
Amid the incident, Sowore has now been reportedly taken to an undisclosed hospital for further examination and treatment.
The activist could be seen surrounded by people, who tried to resuscitate him.
