Taiwan is investigating damage to an undersea cable near Yehliu, suspected to have been caused by a Cameroonian-registered cargo ship with links to mainland China, amid growing concerns over maritime sabotage worldwide.

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.

More evidence of Beijing’s liking for grey zone warfare, or a murky claim with odd African entanglements? Taiwanese authorities have asserted that a China-linked ship entered its waters and damaged a submarine cable.