Malaysian anti-graft authorities have reopened investigations into a contentious submarine deal 16 years ago involving former prime minister Najib Razak, the latest corruption probe facing the embattled Najib, Reuters reports. The investigation centers on allegations that French submarine maker DCNS paid “commissions” of more than 114 million euros  to a shell company linked to Abdul Razak Baginda, a close Najib associate who brokered the US$1.1 billion submarine deal. Najib’s opponents said the payments were kickbacks. Abdul Razak’s Mongolian mistress, Altantuya Shaariibuu, who was said to have demanded a payoff for working as a language translator in the deal, was shot dead and her body blown up with plastic explosives near Kuala Lumpur.