Libyan ex-spy chief Abdullah al-Senussi 'lands in helicopter'
Deposed Libyan leader Muammar Gaddafi's intelligence chief is being held in Tripoli after being deported from Mauritania.
Pictures on social media appeared to show Abdullah al-Senussi stepping down from a helicopter.
Libya has promised a fair trial for Mr Senussi, who fled Libya after last year's uprising, and is accused of crimes allegedly committed during Colonel Gaddafi's rule.
Rana Jawad reports from Tripoli.