Directorate of Criminal Investigations (DCI) boss George Kinoti on Wednesday confirmed that two suspects were already in custody following the Dusit complex terrorist attack.
Kinoti told reporters that the two had been arrested in separate incidences but both in connection to the attack that claimed 14 lives.
One suspect was arrested in Ruaka estate where one of the attackers had lived for four months prior to the attack.
The other suspect was nabbed in Eastleigh estate by the DCI detectives. Details on how he was traced are yet to be revealed.
Detectives uncovered a number of leads in the Sh40,000 Ruaka apartment where one of the suspects had lived in since September.
The attacker had created a hole in the house and hidden an assortment of weapons in it.
Police were tipped off on the Ruaka apartment by a neighbour who recognized the car that was used to ferry the attackers to Dusit.
The man was described as a friendly man who interacted freely with his neighbours.