Eight MPs accused of propagating hate speech will be held in custody until Friday, June 17.
The legislators from Cord and Jubilee will be detaine at Muthaiga, Kileleshwa, Gigiri, Kilimani, Muthangari, and Pangani police stations for four days.
They include; Machakos Senator Johnson Muthama, Women Representatives Florence Mutua (Busia), Aisha Jumwa (Kilifi), MPs Junet Mohammed (Suna East), Timothy Bosire (Kitutu Masaba), Moses Kuria (Gatundu South), Kimani Ngunjiri (Bahati) and Kabete's Ferdinand Waititu.
The eight legislators were arraigned in court to answer charges of inflammatory remarks.
Kuria was caught on camera at Kasarani gymnasium stating that Cord leader Raila Odinga should be assassinated as he was "causing trouble in the country".
Kuria’s remarks elicited anger among Kenyans and leaders, who condemned his inciting statements.
There was drama Tuesday morning at the Nation Centre in Nairobi as Flying Squad officers arrested Junet, who had gone for an interview on NTV.
Junet, Bosire, Ms Mutua and Ms Juma in a press conference said they would storm the office of Inspector General of Police Joseph Boinnet if Kuria is not arrested following his remarks on Raila.
Kuria and Waititu presented themselves at the Directorate of Criminal Investigations headquarters and were grilled over hate speech remarks.
Bosire and Muthama were arrested at their Karen and Gigiri homes respectively by Flying Squad officers, after the detectives surrounded their homes for hours.
Ngunjiri also presented himself to the police for questioning.
Boinnet had ordered the legislators to present themselves to the police for questioning.
The University of Nairobi students' leader Babu Owino was also arrested and taken to Kilimani Police Station for threatening Kuria over his remarks on Raila.