Only drivers entering Parliament and government offices were allowed to drive their vehicles past the double roadblock.
Vehicles were re-directed to use Harambee Avenue to access the Central Business District (CBD).
On the other side of Parliament Road coming from town towards Parliament, there was a single roadblock which was not controlled by police but slowing the movement of cars joining the road.
Harambee Avenue had also a roadblock on the side of vehicles leaving the CBD.
Only vehicles going to parliament and other government offices were allowed past the roadblock placed near the Police Headquarters.
Harambee Avenue hosts the Office of the President, his Deputy, Police headquarters as well as the State Law office among other key government installations.
A senior police officer told Capital FM News that the measures were part of security interventions following terrorism and other threats facing the country.
Last month a staff of the Senate was arrested after he was named in an intelligence report for planning to facilitate attacks on Parliament buildings
READ: Senate employee arrested over terror links