China Coast Guard (CCG) vessels conducted a patrol in waters surrounding the Diaoyu Islands Monday, according to a statement issued by the State Oceanic Administration (SOA).

The vessels are CCG 2306, 2350 and 2102. China has been conducting patrols on a regular basis.

The SOA plans to enhance law enforcement over uninhabited islands in 2015, and to increase maritime strength such as further developing icebreakers, its director Wang Hong said in February.