Beijing, A government in northeast China kept quiet the discovery of melamine-tainted eggs for weeks and ordered a media ban before Hong Kong authorities finally revealed the problem, state press said. The animal sanitation inspection department of Liaoning province suspected the tainted eggs came from chicken feed and ordered an investigation into the Mingxing Feed Company as early as October 6, the Beijing News said. The discovery of melamine-tainted eggs was announced by Hong Kong food safety authorities on October 26, with the contaminated products being traced to Liaoning