Two persons were killed and three others injured when explosives used for bursting rocks went off while being checked, police said Friday.
Police said the quarry supervisor had set the timer on the explosives to explode on September 12 evening, but as it had rained heavily, it did not explode.
He came to the site again last evening and as he was examining the explosives, it exploded.
The supervisor died on the spot while four workers who were with him were seriously injured.
A worker succumbed to his injuries at the government hospital Friday, police said.
They said the supervisor's mother suffered a heart attack on hearing her son's death and died at the hospital.
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