El-Zakzaky has been in custody since December 2015 when members of the group clashed with soldiers in Zaria.
The protesters are demanding the release of their leader, Ibrahim El-Zakzaky.
El-Zakzaky has been in custody since December 2015 when members of the group clashed with soldiers of the Nigerian Army in Zaria, Kaduna State.
The soldiers accused the Shiites of attempting to assassinate Chief of Army Staff, Tukur Buratai.
El-Zakzaky was said to have been severely injured during the clash leading the government to fly him out of the country for treatment.
He is said to have been returned to Abuja, but his whereabouts have since been shrouded in mystery.
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Meanwhile, the activities of IMN have been banned in Kaduna and the group has been declared illegal.
Governor Nasir El-Rufai later said that the group had become dangerous because it had no respect for constituted authority.