I have watched the 2 films "Plane" and "Shotgun Wedding".
In these films, there is a group of people who holds hostage for ransom. And people in the films call them "pirates" although these groups hold hostage on land.
In "Shotgun", the group held people at a wedding near a beach in the Philippines and in "Plane" the group held people who survived from a plane accident on an island in the Philippines.
In both cases, there is no "ship" involved, but they still called them "pirates"
What do we call a group of people who holds hostage for ransom?