In Madhya Pradesh, six people were killed and two seriously injured when an illegal coal mine caved in at Chingi Tola area of Singrauli district this morning.According to initial reports about 14 persons were doing illegal mining at the site at the time of mishap. Eight people have been rescued. Injured have been admitted at Northern Coal Fields Limited Hospital, Singrauli. District administration had taken action three days back to close the illegal mine.The district collector has announced an ex-gratia of five thousand rupees each to the next of the kin of the deceased.