MALAYSIA, Aug.18 (CNN) — A Malaysian oil tanker has been hijacked and taken into Indonesian waters, Malaysian authorities said Wednesday.

The MT Vier Harmoni was carrying about about 240,000 gallons (900,000 liters) of diesel valued at about $400,000.
Ahmad Puzi Ab Kahar, the director general of the Malaysian Maritime Enforcement Agency (MMEA), said the vessel and its cargo are near the Indonesian island of Batam.

"We got in touch with our Indonesian counterparts this morning to launch a joint operation," he said in a tweet.