
The portion that exploded was the section close to the stairway leading to Aetha-gala near the North-Western Provincial Council Building complex.
Two spots on the rock were found to have split with eruptions extending over n a 50-metre stretch.
Several residents said that the rock exploded at about 10 p.m. on Saturday (19).
A team from the National Building Research Institute's Landslide Division had visited the site to probe the explosion.
Similarly reports say that several rock layers have been displaced.