Former Libyan intelligence chief Abdullah al-Senussi has been captured, a source of the ruling National Transitional Council (NTC) told Xinhua Sunday.

Senussi, who had been at large since the fall of Tripoli to NTC forces in August, was seized earlier in the day in the southern Libyan town of Gaara by Sabha militias, the source said.

Senussi's captors are now looking for a safe place to keep him in custody, he said, adding that NTC deputy chairman and spokesman Abdul Hafid Ghoga is to hold a news conference on the event late Sunday.

Senussi, 62, is the brother-in-law and former right-hand man of Libya's slain former strongman Muammar Gaddafi.

Senussi, along with Gaddafi and his second son Saif al-Islam, is wanted by the International Criminal Court on charges of crimes against humanity. The court issued arrest warrants for them in late June.