According to a source inside the school, the stampede was triggered by four recruits who ran towards a parade of about 10,000 recruits at 6AM, in what appeared like they were running from danger.
The four had skipped the morning parade before they saw instructors patrolling the area near where they were hiding and decided run and join the rest.
In November last year, one person died and 20 others were seriously injured in a botched terror drill at Strathmore University.
The students were reportedly caught off guard when men dressed in Arab scarfs showed up and started shooting what was later revealed to be rubber bullets.
Reports indicate that some students jumped from the fourth floor of their classrooms while others took to the nearby river in search of an escape route.
Following the tragic mock exercise, the National Police Service banned all schools and campuses from conducting terror drills on their own.
The stampede was triggered by the explosion of an electrical transformer that the students thought was a bomb explosion.