He was held incommunicado in prison for ten days before being released without charge.

在被不予指控释放前，他在监狱里被单独监禁了10天。

《柯林斯英汉双解大词典》

They may be held incommunicado and without charge for 120 days before being put before a special court that could impose further months of detention.

他们会在没有被控告的情况下先被单独监禁120天，然后经特别法庭审判，可能判处更长时间的拘留。

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When the story about Prisoner X first emerged, Israeli media said the unidentified man was being held incommunicado at Ayalon high-security prison in Ramle, central Israel.

BBC: Australia orders review into Israel Prisoner X case

He added that Gen Ntaganda was being held incommunicado at the US embassy and had no access to communication devices, the BBC's Prudent Nsengiyumva reports from Kigali.

BBC: Bosco Ntaganda: US wants swift ICC transfer from Rwanda