Operatives of the Abuja police command have arrested some of the protesters who converged on the Moshood Abiola Stadium in Abuja.
The police picked them up outside the stadium, which was approved for the protest.
Conveners of the protest had demanded to use Eagle Square for convergence but they were denied access.
Authorities of the Federal Capital Territory (FCT) had obtained a court order which restricted the protesters to MKO Abiola National Stadium.
However, on day three of the protest, the protesters had stayed away from the venue in the early hours of the day.
But they started regrouping in tens around 11am and just as they were to form a large group, the police released gunshots and teargas.
They also arrested all those on the ground, including journalists, who identified themselves before they were released and ordered to leave immediately.