Police have said investigations into a grenade shell found at Prime Minister Raila Odinga's office point at "mischief".
Police Commissioner Mathew Iteere said that if the device was a live grenade, it is of a type that can neither cause death nor injuries when exploded.
"We want to know who placed it there and with what motive. All officers who have been deployed here for the last month will be investigated. It’s some kind of mischief. Why place a dummy; this is what we want to establish,” said Mr Iteere.
Mr Iteere spoke to journalists Wednesday morning when he inspected the scene where the shell was found.
The scene is a section of the building’s basement, littered with broken plastic and steel pipes, planks of timber and pieces of wood.
The police chief told journalists at the scene: “This area is very dusty as you can see. But the shell was quite clean. This indicates it was placed here not long before the matter was reported. May be a few hours, a day before but not more than a week.”
"One man gives freely, yet gains even more; another withholds unduly, but comes to poverty. A generous man will prosper; he who refreshes others will himself be refreshed." Rev Canon Karanja.