15.06.2016: 2210 UTC: Posn: 08:17.3N – 150:53.4E, Between Pisares Island and East Fayu Island, Caroline Islands, Federated States of Micronesia.
While underway, a vehicle carrier proceeding to Townsville, Australia received call on VHF Ch.16 from two suspicious boats approaching at high speed. The boats initially called the vessel and asked it to stop. Master raised the alarm and increased speed.
The boats continued their approach and again called the vessel and identified themselves to be Navy boats and indicated their intention to attack if the vessel did not stop. The boats continued to threaten the vessel as they approached. As the boats closed to the vessel the Master observed each boat with a number of people.
After around 20 mins the suspicious boats stopped pursuing and moved away.
Original report here IMB ICC