Nigerian authorities have been asked to release a television presenter detained by state security officials.
One of the guests criticised President Obasanjo on the show
The Committee to Protect Journalists Media campaign group says Mike Gbenga Arubela was arrested on Wednesday.
The day previously, he had hosted a show discussing next year's presidential elections on which a guest criticised President Olusegun Obasanjo.
The director-general of state security said he was picked up on the basis of a court warrant, AFP news agency reports.
"We are going according to the rule of law and the norms, and the norms say when an investigation is in progress in a case, you don't disclose the details of that case until the investigation is completed," Kayode Are said.
African Independent Television (AIT) was asked to hand over a tape of Tuesday's Focus on Nigeria programme, which Mr Arubela had hosted.
According to the CPJ, it was the second raid on AIT's Abuja offices in a month.
On 14 May, plain clothed security agents told managers at the Abuja bureau to stop broadcasting a privately produced 30-minute documentary about attempts by Nigerian leaders to prolong their time in office.
A few days later, Nigeria's Senate threw out a proposed constitutional amendment that would have allowed Mr Obasanjo to seek another term in office.