Nairobi - Kenyan police said they seized a large haul of explosives on Wednesday in the capital Nairobi disguised as boxes of books.
Some 400 sticks of explosives - used normally in the mining industry - were found by police at a bus station after they were tipped off by members of the public, said Patrick Oduma, a police chief in Nairobi.
Kenya has suffered a series of attacks since invading southern Somalia to fight al-Qaeda linked Shabaab insurgents there in October 2011.
Kenya's invasion however sparked an angry reaction and warnings of revenge from the Islamists.
Police said they believed the explosives had come from Tanzania and were being transported to Kenya's port city of Mombasa.
Oduma said investigations were continuing as to whether the explosives were linked to attacks in Kenya.
"If combined together, they are capable of bringing down a building," Oduma added.