Anti-terror police team investigating the Dusit attack, on Saturday, raided Parkside Villa Hotel in Kitui town.
In the operation, the officers arrested three foreigners and a Kenyan.
The three between the ages of 24 and 25 were identified Musa Abdulkadir Ahmed a Kenyan; Ahmed Aris Mohamed, and Mohamed Abdi Ali who were discovered without any identification.
The fourth, a man of Somali decent aged 47 years had a British passport bearing the name Muhudin Hassan, which police suspected is forged.
Kitui County Police Commander Antony Kamitu confirmed that arrest stating that the officers raided the hotel from a tip-off.
At the same time, police apprehended the wife of Dusit suicide bomber Mahir Khalid Riziki.
The woman, who has been identified as Sahaila Mwinyi, was nabbed by a special team of detectives in Bakarani, Mombasa and taken in for questioning.
The father of the 25-year-old attacker was also arrested in a similar swoop in Majengo.
On Friday, five suspects linked to the Dusit D2 terror attack were presented in a Nairobi court.
The five, Joel Ng'anga Wainaina, Oliver Kanyango Muthee, Gladys Kaari Justus, Osman Ibrahim and Guleid Abdihakim (Canadian) were arraigned on Friday afternoon and are yet to plead to the charges.
Principal Magistrate Martha Mutuku directing that the suspects be placed in custody at any police station of the investigator’s choice.
DPP Noordin Haji revealed that he had appointed a team of prosecutors to offer technical guidance to the investigators on a continuous basis so as to ensure that the investigations are meticulous and fast-tracked.
He further assured that his office was working overtime to ensure that the perpetrators and their accomplices are brought to book.
"I take this opportunity to assure the country that we shall do everything possible to ensure that persons behind the organization, planning funding and execution of terror attack are brought to book and that justice is delivered to the victims of this henious crime," he stated.
