As you can see, the Federation has been secretly working on a Metroid breeding program. For peaceful application only, of course.
— Adam Malkovich
The Restricted Laboratory is an area in the Restricted Zone where the Biologic researchers bred and researched Metroids. The high-security area appears to be kept secret by Biologic Space Labs and the Galactic Federation.
Samus enters the area after obtaining the Wave Beam. She examines the area, but before getting very far, an SA-X attacks Metroids in the Laboratory. Possibly due to the insertion of Metroid DNA into Samus, the Metroids did not attack Samus, only the SA-X. The SA-X's attack triggers a Countdown, giving Samus sixty seconds before the Restricted Laboratory is detached and jettisoned away. The entire laboratory detaches and explodes, leaving only Samus's accounts as evidence for the Federations actions.
An SA-X being attacked by many Metroids
- "As you can see, the Federation has been secretly working on a Metroid breeding program. For peaceful application only, of course. Please understand. But perhaps you already knew of this program's existence? Certainly, you must have had doubts when you saw Sector 1. SRX, a faithful replica of the SR388 ecosystem... Ideal for raising Alpha, Gamma, Zeta, and even Omega Metroids. This research even uncovered techniques for rapid growth. Imagine...creating an Omega from a larval Metroid in days... But that research is finished. The X has smelled out its natural enemy, and one of the SA-X is on its way here..." —Adam Malkovich (Metroid Fusion)
- "60 seconds to detachment of Restricted Laboratory." —On Screen (Metroid Fusion)
- "Restricted Lab jettisoned." —On Screen (Metroid Fusion)