Zimbabwean authorities has said the military will remain in the capital until "this situation is over," a reference to opposition protests over alleged manipulation of Monday's election results.
Home Affairs Minister Obert Mpofu accused the opposition of using the presence of international election observers to "grandstand" and cause "anarchy."
Police have said they requested the military's help because they were "unable to cope."
Zimbabwe's president has urged political leaders to advocate for peace "as this day that ended in tragedy comes to a close."
President Emmerson Mnangagwa is tweeting not long after he blamed the opposition for deadly violence in the capital that he said was "meant to disrupt the electoral process."
President Mnangagwa, in a statement carried by state media, said the opposition under Nelson Chamisa were responsible for the chaos "meant to disrupt the electoral process."
A spokesperson said, "We are seriously meant to wonder that this means. Are we at war?" The opposition says it condemns violence in all its forms."