Zimbabwe's opposition, the Movement for Democratic Change, has accused the ruling ZANU-PF party of trying to provoke it into violence to declare a state of emergency.
The party warned the country could descend into bloodshed without intervention from African states.
The MDC, which has accused the government of trying to steal the election, said poll officials had started counting votes privately.
It says President Robert Mugabe's ZANU-PF has launched a violent campaign against opposition supporters.
At least 60 farmers have been forced off their land since the weekend amid heightened tensions as the country awaits the presidential election results.
Meanwhile, lawyers for the MDC have told the high court there was no reason to further delay election results after a judge agreed to hear their case as a matter of urgency.
The electoral commission, which has refused to give any word on the outcome of the 29 March ballot, had hoped the judge would decide either the MDC's demand was beyond his jurisdiction or it should not be considered on an urgent basis.
