A passenger ferry collided with a barge in Hong Kong 's crowded harbor . The boat rolled violently before it partially sank . The death toll has risen to nine , Hong Kong authorities say . Authorities are searching for countless others who are missing . Police have arrested seven crew members on suspicion of negligence .
A passenger ferry collided with a barge in Hong Kong 's crowded harbor . The death toll has risen to nine , Hong Kong authorities say . Authorities are searching for countless others who are missing . Police have arrested seven crew members on suspicion of negligence .