"Satish K (22) who was on the run since Saturday after allegedly beating to death his junior Harshavardhan Rao (19), a 2nd year B Com student, was arrested from Kachiguda railway station here this morning," Assistant Commissioner of Police (Sultan Bazar division) Ravula Giridhar told PTI.
"The accused has confessed to the crime and expressed sorry for his action," he said.
The incident happened on Saturday when Rao objected to eve-teasing of his classmate by Satish, following which a scuffle broke out between the two in the classroom.
Satish allegedly delivered blows twice on Rao's neck and chest after which the latter fell on the bench and hit his head on an iron rod on the edge of the bench, police said.
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"Rao became unconscious and was shifted to a nearby hospital where he died while undergoing treatment," they said.
A murder case has been registered against Satish at Sultan Bazar police station, police said.
The protesters had forced open gates of the college and damaged windshields of two cars parked nearby.