Inspector General of Police Douglas Kanja has publicly named Ms Sharleen Temba as the ringleader of the Kwa Binzaro cult deaths in Malindi, Kilifi County.
Ms Tembe is among 11 people after the police obtained an order to detain them pending the completion of the probe into activities of the cult.
Others in custody are Jairus Otieno Odere and his wife, Lian Akinyi, who lost their six children to the cult.
The children's death lifted the lid on the activities of the cult.