CCC leader Nelson Chamisa is set to host a rally in Manicaland on Saturday at Sakubva stadium.
Chamisa will address CCC supporters as he mobilises voters for the upcoming 26 March by-elections.
Writing on Twitter, Mahere said the police have been notified about the upcoming rally in Mutare.
On Friday, police did not sanction a CCC rally which was supposed to be held at Rudhaka Stadium in Marondera on Saturday.
Heavily armed riot police formed a human wall at the stadium, blocking all entrances.
