Igboho was arrested in the country on Monday.
The Yoruba-speaking supporters demanded that Igboho should not be returned to Nigeria, saying that he had committed no offence.
There had been reports that Igboho may be arraigned today before a Court of Appeal in the Benin Republic.
As of the time of filing this report, Igboho was yet to arrive at the court.
The PUNCH gathered that the rights activist was held by Brigade Criminelle in Cotonou after he was arrested at Cardinal Bernardin International Airport, Cotonou, Republic of Benin, with his wife on their way to Germany on Monday night.
On Wednesday, there were protests in Ibadan, Cotonou and London against Igboho's arrest.
In Ibadan, armed policemen dispersed his supporters who protested in the city.
The protesters marched through the road leading to Soka area to the Soka bus stop along the Lagos-Ibadan Expressway where they sang and demanded the release of Igboho.
The protesters were bearing placards with various inscriptions.