Police sub-inspector B Adi Prasad said that Y Srikanth Prasanna Kumar (20) committed suicide in the early hours.
He hailed from Ungaturu in West Godavari district.
However, his father Y Srihari Babu expressed suspicion of foul play. His son, who was partially disabled, could not have walked up to the top floor on his own, he told reporters.
Further probe is on.