Panic prevailed at Sachivalayanagar in Vanasthalipuram for the third consecutive day on Sunday after residents heard mysterious sounds.

Residents came out of their houses after they heard sounds around 8.45 p.m. and again at 9 p.m. Though seismic observatory equipment was installed on Saturday at a couple of places, officials concerned reportedly did not turn up on Sunday to conduct further studies.

Residents are in panic since Friday night after hearing strange sounds.