Shell has shut down one of its oil processing units in Pulau Bukom to facilitate investigation into a suspected leak in the system, the Maritime and Port Authority of Singapore and National Environment Agency said on Friday.

Shell estimates that a few tonnes of refined oil products, along with cooling water discharge used in the refining process, have leaked.

Shell has temporarily closed an oil processing unit at its Pulau Bukom Energy and Chemicals Park in Singapore to facilitate investigations into a suspected leak, according to a joint statement by Singapore agencies today.