The Indonesian Navy is allegedly investigating a possible violation of Indonesian territory by Malaysia on Tanjung Datuk Island, according to a report in The Jakarta Post.

The area is located on the border between Indonesia's West Kalimantan and Malaysia's Sarawak.

“Unconfirmed reports on Monday said that the Indonesian Navy in the regional capital of Pontianak had received information about the alleged border violation from Pontianak’s Navigation District Office on Saturday,” wrote the report.

It said that a signal light is being installed on Tanjung Datuk by Malaysia, and the Indonesian Navy has sent a ship and an aircraft to the island and they have taken aerial photographs of the activities in the disputed area.

Tanjung Datuk lies on the border between the district of Paloh in the regency of Sambas, West Kalimantan, and the Malaysian state of Sarawak.

The Tanjung Datuk area, which includes the sand ridge of Gosong Niger in the sea, as well as Camar Wulan on the main island, is still a disputed area between the two neighboring countries.

Meanwhile, a Royal Malaysian Navy spokeperson said that there has not been anything official on the matter from the Indonesian government and the agency will be checking the veracity of the reports.