As many as 40 to 50 workers are feared trapped after a mine collapsed in India's Lalmatia last night.
Apart from the workers, some machineries of private company are also feared trapped inside the debris, the CISF has said, India Today agency reported.
Those injured have been rushed to a nearby hospital.
CISF officials say rescue operations, which could not begin due to night fog, are now underway at the site and electric supply has been disrupted.
NDRF teams from Patna are on their way to the spot of the mishap. An additional manpower comprising 2 inspectors, 21 CISF personnel from ECL Sheetalpur headquarters has been sent to the site.
Chief Minister Raghubar Das is monitoring the situation closely, asks concerned officials to intensify rescue operations.