TUNIS, June 14 (Reuters) - Eight Tunisian citizens working in Libya's capital Tripoli have been kidnapped, according to Tunisian state radio, citing a local official, on Sunday. Tunisian officials were **t immediately available to confirm the abduction. But the news came after gunmen on Friday kidnapped 10 staffers from the Tunisian consulate in Tripoli. ** group has claimed responsibility. Libya is in turmoil, with two rival governments and their armed factions battling for control. ...