Around 1,700 migratory birds, most of them bar-headed geese, have been found dead under mysterious circumstances in and around Himachal Pradesh's Pong Dam lake In Kangra district, prompting the authorities to suspend tourism in the area. The sale and purchase of poultry has also been banned in some parts of the district as a precautionary measure against the possibility of a bird flu outbreak. Three states in the country have detected Avian Influenza cases in the last few days.