Critics of Nelson Chamisa say that he and fellow opposition officials urged protesters to take to the streets two days after polls by insisting the MDC had won the election and telling supporters to defend their vote.
Growing food prices and the country's dire economic state could also affect those living in urban areas, the UN food agency added.
Mnangagwa was inaugurated on Sunday after the constitutional court dismissed an attempt by the opposition mdc alliance to rule that his Zanu-PF party stole the July election.
President Mnangagwa thanked Zimbabweans, saying he is humbled by their confidence in him.
Mnangangwa was announced president in the early hours of this morning by the Zimbabwean Electoral Commission.
The country’s electoral commission is currently counting election results after millions of eligible voters cast their ballots on Monday.
Thousands of eligible voters have been making their marks at over 10,000 polling stations since the early hours and now all stations will close at 7 pm.
MDC Alliance leader, Nelson Chamisa, has been reported to the police by Zimbabwe’s Electoral Commission for violating the Electoral Act by campaigning during a press briefing on Sunday.
More than five million people have registered to cast their ballots in a crunch election which has drawn interest from around the world.
The election will see President Emmerson Mnangagwa, a long-time Mugabe ally, Nelson Chamisa, a lawyer and pastor who is vying to become Zimbabwe’s youngest head of state.
Zimbabweans will head to the ballot box on Monday, in the first elections since former president Robert Mugabe was pushed out by the military.
The party, led by Nelson Chamisa, has outstanding concerns over the printing, storage and distribution of ballot papers to be used in Monday’s election.
High Court Judge Priscilla Chigumba will manage the elections body overseeing this year’s polls.
