TRIPOLI (Reuters) - Former Libyan Prime Minister Ali Zeidan has been released after being abducted during a visit to the capital, Tripoli, and held for nine days by an armed group, a relative said on Wednesday. Zeidan was prime minister from 2012-2014, a period when Libya slid deeper into the political turmoil and armed conflict that has plagued the country since Muammar Gaddafi was overthrown six years ago.  He has since been living in Germany with his family. It is not clear why Zeidan traveled to Libya or why he was abducted. He was being held by a group aligned with the U.N.-backed government in Tripoli, though he faced no judicial charges, a source said. The U.N.-backed government has not commented on the case. Tripoli is controlled by a number of the armed groups that have held power in the capital since 2011. Some have been given semi-official status by successive governments, but the groups remain unaccountable and involved in criminal activity. A lawyer for Zeidan, Moussa Al-Doghali, told France 24 Arabic TV channel that his client was released without explanation and that he did not know the circumstances of his arrest and detention. Zeidan was in good health and was staying in a Tripoli hotel following his release, Doghali said.   In October 2013, Zeidan was briefly abducted from a Tripoli hotel room by an armed group allied to the parliament that sacked him just over a year later. 