The incident occurred when the victims were engaged in digging, Morena superintendent of police Navneet Bhasin said.
The deceased were identified as Vintosh Rawat (32), Ramkali Rawat (12), Vindu Rawat (14) and Sunma Rawat (16).
The district administration has announced an ex-gratia of Rs 5,000 each for the kin of the deceased persons.