Hundreds of dead pigs fished from Shanghai river - CNN.com
Farmers chuck their diseased pigs into the river and let them flow down stream. Then it is not their problem.
How can it be that the PRC authorities do not know who are the culprits.
It is not only 5 pigs.
Hauling 6,000 pig carcasses from the farm to the river side & dumping them, cannot escape observation and notice.
If one is Muslim living in Shanghai, safer to drink bottled mineral water temporarily.
Moreover, if 6,000 pigs die from disease in a short time, then something is terribly wrong in the farms.