The Kerala Police are investigating the mysterious deaths of an IRS officer, his sister, and their mother in Kochi. The officer, Maneesh Vijay, and his sister, Shalini Vijay, were found hanging inside their house, while their mother, Shakuntala Agarwal, was discovered dead on her bed. Police have not yet established a direct link between the deaths and a CBI case in which Shalini was summoned as an accused. Preliminary findings suggest the siblings died by suicide, but the cause of their mother's death is still under investigation. The family had been residing in the quarters for the past year and a half but reportedly kept to themselves, maintaining limited interaction with neighbours, police added.