The Singapore Shipping Agency and Singapore Navy has warned oil tankers sailing through the Malacca Strait of a terror group planning attacks in the area, according to Reuters.
The goal of the terrorist group, which is so far unnamed, is to gain widespread publicity for their cause, the Navy said.
The Navy has recommend ships to strengthen on-board security measures, remain vigilant and report any unusual activity.
Singapore is the world largest refuelling hub and one of the largest container ports.
About 33% of global seaborne crude oil shipments pass through the 965km channel, which is shared by Malaysia, Indonesia and Singapore.
Malaysia’s maritime enforcement agency said it was aware of the alert and was stepping up security in the shipping lane.