Mozambican President Filipe Nyusi on Wednesday asked a London court to uphold his immunity, while a shipbuilding company at the centre of Mozambique's litigation over the decade-long "tuna bond" scandal tried to drag him into an ongoing high court case. Emirati-Lebanese shipbuilder Privinvest is embroiled in a $3.1-billion lawsuit from Mozambique, which accuses it of paying bribes to officials and Credit Suisse bankers. London's High Court has yet to rule on the case following a trial last year.