"We are keeping a watch on the migratory birds which annually come at Sukhna Lake," UT Conservator of Forests-cum-Chief Wildlife Warden Santosh Kumar said.
Migratory birds including Pochard, Coot, Pintail, Mallard come from Siberia, China and other parts of the world during November and December and they stay till March, he said.
UT Chandigarh Animal Husbandry Department Joint Director Lovelesh Kant Gupta, meanwhile, said there was no need to panic as there was no outbreak of bird flu in the city.
"There is a suspicion of bird flu...It is not an outbreak. Had there been an outbreak, then migratory birds would also have died," he said.
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Union Ministry of Agriculture, Animal Husbandry and Dairying had yesterday notified bird flu in geese under the Control of Infectious and Contagious Diseases in Animals Act, 2009, Gupta said.
"Culling of geese was done as part of preventive measures," he added.
The killings were carried out as a precautionary measure to prevent any outbreak of bird flu in the city and adjoining areas.
Besides, the authorities also restricted the movement of public around the Sukhna Lake, a famous tourist spot here, and have sounded alert in Punjab and Haryana in this regard.
With authorities keeping surveillance in and around the lake, UT Chandigarh authorities have said the entire lake will remain out of bounds for people till further orders.
Yesterday, the state-run Central Poultry Development Organisation had halted all supplies of eggs and birds as a precautionary measure.
Nearly 35 geese had died at the lake recently under mysterious circumstances. The Chandigarh administration sounded an alert after it was confirmed that one of the ducks had died of H5N1.