Harare - Zimbabwe's official election body says an estimated two million people have cast their vote in a referendum on a new constitution that seeks to curb presidential powers and strengthen human rights.
Judge Rita Makarau, who heads the electoral commission, said on Sunday the low estimate came from early returns from the nation's 9 400 polling stations.
Zimbabwe has an estimated 6.6 million registered voters.
All main political parties had called for a "Yes" vote amid fears of a low voter turnout.
Zimbabweans were given just three weeks to read the 170 page draft of the constitution.
Makarau said the voting was carried out peacefully.
Vote counting began late on Saturday and full results from isolated areas are expected within five days.