JAKARTA: Jakarta has protested against the intrusion of a Chinese coast guard ship into the Southeast Asian archipelago's waters, Indonesia's Foreign Ministry said Monday.

The Chinese vessel, identified as CCG 5204, was seen Saturday in North Natuna waters, Indonesia's exclusive economic zone near the Riau Islands province.

"Following the issue, the ministry on Sunday communicated with Chinese representative in Jakarta to request clarification," spokesman Teuku Faizasyah told AFP on Monday.

The Indonesian maritime security agency said the ship insisted it had been patrolling China's so-called "nine-dash line", an area claimed by Beijing but contested by its neighbours.

"The Ministry re-emphasised to the Chinese representative that there's no overlapping between Indonesia's exclusive economic zone and China's waters," said Faizasyah.