Zimbabwean soldiers are circulating in the capital, Harare, and telling vendors and other people to leave the city centre.
It is not yet clear when the electoral commission will announce the next set of results from Monday’s election. International observers from the Commonwealth and elsewhere are urging the release of the presidential results as soon as possible.
There is a heavy police presence around the headquarters of the opposition Movement for Democratic Change party a day after the military swept into the city to disperse its supporters from protesting. Three people were killed.