They criticised Gachagua for allegedly failing to advise President Ruto as his Principal Assistant on measures that should have been taken to prevent the loss of lives during the anti-tax protests.
The Mombasa Governor highlighted the risks of Gachagua's comments, stating that they undermine national unity and could exploit ethnic divisions.
The DP on Wednesday called for the resignation of the NIS boos whom he blamed for not effectively briefing President Ruto on the magnitude of the protests.
He accused Haji of dismantling the NIS by removing experienced directors and replacing them with less capable individuals.
The NIS boss called on his fellow counterparts in the region to strengthen the capacity of officers in digital skills to counter other forms of insecurity.