"Threat to tankers in Malacca Strait"

"Singapore has learned that an unnamed group may be planning to attack oil tankers in the Malacca Strait, one of the world's busiest shipping lanes.

"The terrorists' intent is probably to achieve widespread publicity and showcase that they remain a viable group," the country's navy warned.

Other large vessels with dangerous cargoes were also at risk, it said.

The navy recommended ships strengthen their onboard security measures, remain vigilant and report unusual incidents."