Zimbabwe police move against PM's party, question top officials and leading rights lawyer

The Zimbabwe prime minister's party says police took three of its senior officials from their homes early on Sunday but gave no reasons for their action.

A prominent human rights lawyer, Beatrice Mtetwa, was a fourth person taken to a suburban office of Prime Minister Morgan Tsvangirai's media and communications department for questioning.

The party said in a statement the three party officials, including senior attorney Thabani Moyo, work on the prime minister's staff.

Voting in a referendum on a new constitution ended late Saturday. All main party leaders called for a "Yes" vote on constitutional reforms. Another official of the former opposition Movement for Democratic Change was arrested before polling began Saturday.

Police enforced a clampdown on rights and pro-democracy groups in the run-up to the referendum vote.