The incident occurred at Kothapalem village of Tallur mandal in Prakasam district. The victim identified as Katam Anusha was a 4th year engineering student at a private college, Darsi circle inspector K Raghavendra said.
Prima facie, Anusha was depressed over differences with college teachers over her examination marks, the officer said.
A case has been registered in this connection and investigations are underway, he added.