A spokesman for the Libyan prime minister has distanced himself from earlier claims made by his office saying that Moussa Ibrahim, the spokesman for late leader Muammar Gaddafi, had been captured.
The BBC reports that an internet recording purportedly by Mr Ibrahim appeared on the internet denying the news and insisting that he is abroad.
The prime minister's office said on Saturday that government forces had arrested Mr Ibrahim south of Tripoli.
But Nasser al-Manaa, the prime minister's spokesman, later said there was no proof of the capture.
Other Libyan officials had also said they were sceptical, as such reports have proved false in the past.