Rescue efforts were on to save the people buried there.
At least two devotees were killed and several others were feared buried at a temple in Madhya Pradesh's Chhindwara district.
A large number of people had congregated on the occasion of Mahashivratri festival to worship Lord Shiva in a cave at Harai Jagir Shiv temple, situated on a cliff, when suddenly a boulder fell on them.
Rescue efforts were on to save the people buried there, the police said.