The deceased were identified as Binil Kumar (23) and Satheesh, they added.
The condition of two of the injured, admitted to the medical college hospital here, is stated to be serious, police said.
According to locals, the mishap happened when a portion of the quarry collapsed during mining.
About 20 labourers, including migrants, were working at the privately-owned quarry, when the tragedy occurred, they said.
More people are suspected to be trapped beneath the piles of rocks, the locals added.
Meanwhile, medical college authorities said treatment including surgery and implants would be given free of cost to all the injured.
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