SINGAPORE - An oil tanker collided with a bulk carrier ship in Singapore waters 11 nautical miles, or about 20km, to the north-east of Pedra Branca on Friday morning.

The Libyan-registered oil tanker Alyarmouk, which collided into the Singapore-registered carrier ship Sinar Kapuas, sustained damage to one of her cargo tanks. As a result, there was spillage of crude oil.

No one was injured in the collision and traffic in the Strait of Singapore remains unaffected.

Upon receiving reports of the collision at about 6am, the Maritime and Port Authority of Singapore (MPA) deployed a helicopter to assess the situation. Oil spill response resources were also activated.

As part of standard operating procedures for joint oil spill combat in the Straits of Malacca and Singapore, MPA also notified the Malaysian and Indonesian authorities.

The two vessels involved in the collision are currently in stable condition and safely anchored some distance off where the collision occurred, said MPA in a statement.

MPA has issued navigational broadcasts for ships to navigate with caution when in the vicinity of the incident site.

MPA is currently investigating the cause of the collision.

In a separate incident, a Singapore-registered barge ran aground at Pedra Branca on Tuesday due to bad weather.

The barge POE Giant 12, which was carrying two bulk loader cranes, left Singapore for Kuantan, Malaysia, on Dec 25.

It is still aground at the island and MPA salvage operations are ongoing as of Friday afternoon.