The singer was in Dubai to take part in the AR Rahman stage show to be held at Sharjah Cricket Stadium later in the day.
The incident took place early in the morning when Chitra and her family were preparing to leave for the rehearsals when they saw the front door of the house open and Nandana missing. As they rushed outside, they found Nanadana in the swimming pool.
She was rushed to a nearby hospital in Jebel Ali, but was already declared dead.
The body has been sent for forensic checking, which will then be preserved and will be sent back to Kerala for the last rites.
It is reported that the singer had insisted to stay at her sister's home instead of staying with the rest of the troupe at a hotel arranged by concert organisers.
The concert will go ahead as per schedule.
Chitra has been a staple in most all Malayalam films. The singer has lent her voice to many Rahman movies and has sung in different languages too.
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