On Tuesday, opposition leader Raila Odinga symbolically inaugurated himself as president in a direct challenge to President Uhuru Kenyatta.
Three private Kenyan television channels remained off air despite a court order on Thursday that they be allowed to resume broadcasting, overturning a government-ordered shut down. But when he tried to serve it to Kenya's communications authority on Friday, they refused to receive it.
"Government expected to restore NTV, Citizen TV & KTN News signals after High Court suspends switch off for 14 days pending case being heard", the station wrote on Twitter. "If the government does not comply with a court order that is so clear, it will raise questions as to the wider rule of law". The office of the UN High Commissioner for Human Rights in Geneva said it was concerned at the government's "attempts to interfere with the rights to freedom of expression".
The US government has declared its support for Uhuru Kenyatta as the president of Kenya.
Kenyatta won an August 8 election that was later nullified by the Supreme Court over irregularities. "This is harassment and intimidation by the government".
The stations remained off the air Friday. "Unfortunately, some media houses chose to disregard this advice ... the government took a decision to shut down the concerned media houses", the Interior Ministry said in a statement.
Odinga took the oath of "president" in a mock inauguration on January 30, a symbolic move in defiance of last year's controversial election and of authorities.
The event was largely peaceful, and the throngs of supporters quickly left the park after proceedings had concluded.
The interior minister condemned the move as an effort to "overthrow" the government of President Uhuru Kenyatta, who won re-election a year ago in a re-run vote boycotted by Odinga.
Two opposition figures, who took prominent roles in the "swearing-in" ceremony have also been arrested. Dennis Onyango, a press officer for Odinga's National Super Alliance (NASA), confirmed to CNN that Miguna had been arrested.
An opposition lawmaker who stood beside Odinga and wore judicial dress was arrested Wednesday and charged with unlawful assembly and giving consent to Odinga administering an illegal oath.
Global calls for dialogue between the two sides have for months been ignored by both the government and opposition.
"Against this backdrop, and in line with its relevant instruments, notably the African Charter on Democracy, Elections and Governance, the African Union rejects all actions that undermine constitutional order and the rule of law", the AU said in a statement, but then added that all sides will have to respect the provisions of the law. But the government warned that Tuesday's events amounted to treason.
CNN's Briana Duggan and Farai Sevenzo reported from Nairobi, Faith Karimi wrote from Atlanta while Lauren Said-Moorhouse wrote from London.