Singaporean oil trader and bunker supplier Hin Leong Trading’s future is the subject of speculation after banks froze its credit lines due to concerns over how it will repay its debt in the wake of the collapsed oil prices.

Hin Leong is believed to have debts in excess of $3bn. It has appointed law firm Rajah & Tann and accounting firm PwC to act as advisors during negotiations with its lenders.