An independent Zimbabwean human rights group says police arrested 13 of its members who staged a protest outside a court where allegations of police assaults and torture were to be raised.

Restoration of Human Rights representative Stendrick Zvorwadza says the 13 demonstrated with placards Wednesday calling for impartiality by police and judicial officials accused of targeting opponents of President Robert Mugabe.

The High Court on Wednesday again postponed an appeal for bail by eight activists of the prime minister’s former opposition group accused over the killing of a police inspector in May.

The suspects deny involvement and say they were assaulted and tortured in custody. The police officer died in a stoning incident outside a bar in western Harare.