Suspected Alshabaab trainers took off minutes before police officers surrounded their hideout in Ngombeni, Kwale County.
Among the items recovered include pangas, knives, cables, fertilizers, matchboxes, military trousers and books and notes with religious writings.
Also recovered were black flags with white writings resembling the ones used by ISIS, al-Shabaab and Boko Haram terror militants.
The anti-terror officers who led the raid also recovered lethal paraphernalia used to make explosives.
“We believe these are teaching grounds for terror activities,” Kwale police boss Tom Odero told the Star.
Odero said some of the writings in books had been translated in Swahili to read, ‘tuko tayari kwa vita’, loosely translates to ‘we are ready for war.’
Nobody was in the house during the raid but there were signs that the occupants left moments before the raid.