Zimbabwe PM's party says police arrest 2 more members of Morgan Tsvangirai's office staff

The Zimbabwe prime minister's party says police have arrested two more members of his staff, bringing to six the number detained since Sunday.

Prime Minister Morgan Tsvangirai "takes this attack on his office as an affront to democracy and the rule of law," said a statement issued by the party on Thursday.

Four party officials were arrested Sunday, along with prominent rights lawyer Beatrice Mtetwa who was trying to represent them during police searches of their offices and homes. A former councilman of Tsvangirai's party was also detained Sunday.

The party's statement said two janitors at Tsvangirai's media and communications unit were driven to the central Harare police station Thursday.

The four top officials are accused of compiling information on the state's failure to prosecute cases of high level corruption.