Public meetings to draft a new Zimbabwean constitution have now concluded after three months of gatherings.
Police say rival party supporters jostled and traded insults at some of the final meetings held in and around Harare on Saturday and Sunday.
The former opposition party, now in a coalition with President Robert Mugabe, says one of its supporters was severely wounded after being stabbed in violence linked to the weekend meetings.
Mugabe says a constitutional referendum will be held in March. It is unclear if the deadline will be met.
The governing coalition was formed after disputed, violence-marred 2008 elections. But it is deeply divided, undermining its job of ushering in a new constitution and preparing for general elections.