Taiwan and China traded barbs over what the government in Taipei suspects was a Chinese-linked ship's damage to an undersea communications cable off the island's coast, an incident that has raised alarm bells on the island.

Taiwan has accused a Chinese-owned ship of severing a critical data cable off its northern coast on Friday. Officials in Taipei discovered that four cores of an international submarine cable, which transmits data to America’s AT&T, were left ruptured early on Jan 3.

A subsea power link and four data cables were damaged December 25, after Eagle S sailed over them on the Gulf of Finland.

The Eagle S, an oil tanker suspected of being part of Russia's shadow fleet, has been stopped and boarded by Finnish authorities in relation to the damaging of power and data cables connecting Finland to Estonia.

Taiwan's coast guard said it sent a ship to investigate a report on Friday from telecoms provider Chunghwa Telecom that an undersea communications cable had been damaged off the island's north coast.

The incident raises concern China will try to cut all undersea cables to Taiwan in the event of a military invasion, so Taiwan is racing to develop a satellite-based internet service.

A Chinese-owned cargo ship suspected of damaging a subsea telecoms cable off Taiwan has stopped transmitting its location on the high seas, Taiwan's coast guard said Tuesday.Taiwan has asked South Korean authorities for assistance in the investigation into the ship after rough seas prevented them boarding the vessel near northern Taiwan,

Taiwan launches an investigation into a Chinese ship suspected of damaging undersea communication cables, seeking to determine the extent of the impact on connectivity.