Malaysian ex-leader Najib Razak swore in a packed mosque Friday he did not order the killing of a Mongolian woman linked to a major defence deal, rejecting an allegation from his ex-bodyguard.Altantuya Shaariibuu was shot dead and her body blown up with military-grade plastic explosives in 2006.Her death was linked to a scandal which allegedly saw kickbacks doled out during a 2002 deal to purchase French submarines, on which Altantuya worked as a translator.This week, a government bodyguard c