Police said the main trafficker of the aliens is on the run.
The foreigners were being changed from one house to the other to avoid being detected. They are set to be processed and sent back to Juba.
MEANWHILE:
A suspected thug was last night shot and killed and his accomplice was arrested in a botched robbery in the Umoja area, Nairobi.
The incident happened at the junction of Manyanja Road when a gang of three was on a robbery spree.
Police say they were alerted and arrived at the scene before killing one suspect and arresting another one while one escaped on foot.
8 Gruesome murders that shook Kenya