The Special Investigations Group is a scientific division of the Galactic Federation. They are only mentioned in the introduction of Metroid: Zebes Invasion Order. The group created a research team for the purposes of studying the Metroids, parasitic creatures newly discovered on the planet SR388. They discovered from experiments on a dead Metroid that it could be brought back to life within 24 hours with heavy exposure to Beta-Rays. This Metroid annihilated the team and left their facility in ruin before it was destroyed by the entire 3rd Division of the Federation Space Army.