The police have sealed off the Kano state house of assembly amid a plot to impeach Abdullahi Ata, the speaker.
Before the assembly was shut, journalists and other visitors were denied access.
The lawmakers are accusing Ata of being incompetent and failing to involve them in critical issues about the house.
At least 21 members of the assembly have reportedly endorsed the removal of the speaker and all principal officers.
Ata has postponed activities in the assembly till the end of June, saying it is to make members prepare for Ramadan.
He emerged in July following the resignation of Kabiru Rurum who stepped down after corruption allegations were levelled against him.