The two were arrested at the Namanga border in Kajiado County after the materials were found in a bus they were operating.
According to the inscriptions on the detonators, they were sent from Tanzania to a Kenyan by the name Juma.
This came as al-Shabaab militants threats were increasing in the country, with security agents, however, foiling multiple attacks especially in the border towns.
Over the weekend, police in Mombasa gunned down an al-Shabaab returnee, alongside his two accomplices who were terrorising area residents. They also recovered a G3 rifle, two magazines, police uniforms, communication gadgets, and a pair of handcuff from their house.
A fortnight ago, police also raided an al-Shabaab safe house in Isiolo County and recovered materials which the suspects were using to make bombs and other improvised explosive devices.
News24