Rescuers listen for sounds of life inside the capsized ship. Source: CCTV/Twitter

3. Seven people swam to the shore from the wreck site and alerted the police, according to the captain and crew members. Divers have arrived to carry out underwater search and rescue.

4. According to maritime experts, the first four hours is crucial to finding survivors. The current situation does not look very optimistic as 12 hours have passed since the passenger ship overturned.