Kevin Sudi Asena, also known as Shitemi Alfred. [Courtesy]

A close associate of controversial pastor Paul Makenzi, accused of orchestrating the Shakahola tragedy that claimed more than 450 lives, has died while in custody.

Kevin Sudi Asena, also known as Shitemi Alfred, passed away on Sunday at the Coast General Teaching and Referral Hospital (CGTRH), where he had been admitted after his condition worsened in prison. He had reportedly refused to take prescribed medication, citing religious beliefs.

Asena is the fifth among about 30 suspects linked to the alleged doomsday cult whose followers were reportedly encouraged to starve in anticipation of meeting Jesus Christ.

Authorities say he had been unwell for some time after his arrest and was first taken to hospital on May 10 as an outpatient before being discharged. However, his health deteriorated again on May 14 after he declined treatment.