The frigate USS Nicholas took the piracy suspects into custody after the warship sank a skiff, and confiscated a suspected mother ship, said a statement from US Naval Forces.

"While operating west of the Seychelles in international waters, Nicholas reported taking fire at 12:27 am local time from a suspected pirate skiff and returned fire before commencing pursuit of the vessel until the disabled skiff stopped," the statement said.

"At 1:59 am personnel from Nicholas boarded the disabled skiff and detained three personnel. The boarding team found ammunition and multiple cans of fuel on board."