Mugabe's ZANU-PF party accused of intimidation tactics against human rights, pro-democracy groups.
The senior officials in Prime Minister Morgan Tsvangirai's party were arrested on March 17 and initially kept from bail by Mugabe allies in legal system.
Zimbabwe's High Court ordered the immediate release of a prominent rights lawyer detained for eight days for obstructing the course of justice.
The jailing of Beatrice Mtetwa has been described by rivals of longtime President Robert Mugabe as a campaign of intimidation ahead of elections
Beatrice Mtetwa's prolonged stay in jail is seen as crackdown on critics of President Robert Mugabe.
Comes after a court adjourned on charges she allegedly obstructed justice and police ignored a judge's order to release her.
Police have brought prominent rights lawyer Beatrice Mtetwa to a court on charges of obstructing justice after ignoring a judge's order to release her a day earlier.
Move comes after vote on constitutional referendum and a series of attacks on rights groups.
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