They said the agency is also taking steps to bring under its ambit cases registered in various states by the police.
The Union government on Monday barred the telecast of Malayalam news channel MediaOne citing "security reasons", but the Kerala high court stayed the implementation of the order for two days.
The fire broke out around 12.30 am in the ICU ward located on the first floor of the four-storey Uday Shivanand Hospital in Anand Bungalow Chowk area, where around 31 patients were admitted.