New Delhi, Feb. 10 -- Tanzania's opposition leader charged with treason appeared in court for the first time in months on Monday, but the hearing was adjourned yet again after he opposed the prosecution's plan to have secret witnesses appear in a special enclosed cell.

Opposition leader Tundu Lissu has been in prison for 10 months after he was arrested following an opposition rally in which he called for constitutional and electoral law reforms before last year's disputed election.

Lissu, who is representing himself in the case, said the punishment for treason is death and that secret witnesses in enclosed cells pose a huge risk and are likely to result in an unjust outcome for the case.

Judges said a decision on the objection would be...