Madhya Pradesh Chief Minister Shivraj Singh Chouhan on Monday expressed grief over the death of two labourers trapped in a tunnel in Katni district, and announced a financial assistance of Rs 4 lakh to the kin of each of the deceased and Rs 50,000 each to the injured persons, an official said.

Despite an extensive rescue operation for 28 hours, labourers Gorelal Kol (30) and Ravi Masalkar (26) could not be saved, MP's Additional Chief Secretary (Home) Dr Rajesh Rajora told PTI.