China kills market birds as flu found in pigeons

A worker spays disinfectant liquid on to chicken cages at a wholesale market on Thursday, April 4, 2013, in Shanghai, China. In a worrisome sign, a bird flu in China appears to have mutated so that it can spread to other animals, raising the potential for a bigger threat to people, scientists said Wednesday. (AP Photo)BEIJING (AP) — China has started slaughtering all poultry at a Shanghai market after a new bird flu strain that has killed five people was detected in pigeons being sold there.