According to police, the accused Narasimha, was in a drunken state when the incident took place.
When the minor girl, who is dumb, came to Narasimha seeking alms, he threw acid on her, they said.
The girl, who sustained burn injuries on her back and legs in the incident, was taken to a nearby hospital, police said, adding, she was in a stable condition.
Following a complaint lodged by the girl's relative, Jeedimetla Police took Narasimha into custody and booked a case under section 324 (voluntarily causing hurt by dangerous weapons or means) of IPC.