A city constable body was found in a drain near Satavahana College under Suryaraopet police stations limits.
Identified as armed reserve head constable Krishnam Raju, lying partially beside the drain with face drowned in the sewage.
Police rushed to the spot,sent the body to Government Hospital for post-mortem.
Mr. Raju was suffering from seizures, suspect that he might have fallen into the drain after seizure and could have choked to death.
A case under section 174 is registered.