Police claimed the youths were allegedly upset with Kher for singing more Hindi songs than ones in Kannada.
A bottle was hurled at playback singer Kailash Kher when he was performing on stage on the final day of Hampi Utsav.
Police detained two youths from the crowd in connection with the incident.
Police claimed the youths were allegedly upset with Kher for singing more Hindi songs than ones in Kannada.