Another ex-Shell Eastern Petroleum worker has admitted to stealing oil from a Singapore refinery as part of an ongoing series of prosecutions in the case.

Former gas safety tester Muhammad Ashraf Hamzah, 39, worked with others to misappropriate 55,321 tonnes of gasoil worth nearly $25m between 2014 and 2016, according to the Straits Times.

He received at least $700,000 for his role.