Cai Wenjun / Shanghai Daily news

A pork merchant is being investigated by police over bad meat that has poisoned more than 300 residents, food watchdogs said yesterday, Shanghai Daily reported.

The Shanghai Food and Drug Administration said they had traced the bad meat to a batch of pork and pig guts bought by the merchant at the Zhejiang Haiyan County Livestock Slaughterhouse. The merchant sold the meat and guts to two stalls in the Shanghai Agricultural Product Wholesale Market in Pudong New Area, from where they were distributed to 66 local wet markets, the administration said.