An engineering graduate, Santosh, committed suicide by jumping into the Hussainsagar on Monday and his body was found floating in the lake on Tuesday, police said.
Santosh, a resident of Old Malakpet, sent an SMS to his cousin that he would end his life and switched off his mobile.
His family members began searching for him but in vain.
On Tuesday morning, passersby noticed a body floating in Hussainsagar and immediately called the police.
The police registered a case and are investigating on the matter.