Chennai, Feb. 5 -- Tamil Nadu, particularly Chennai, has been put on high alert after it was confirmed that the death of over1500 crows on the southern flank of the city and the East Coast Road was due to avian flu, the H5N1 virus.

The sudden death of a huge flock of crows last month in Adyar, Pallikaranai, Velachery, Thiruvanmiyur, ECR and the IT Corridorof Old Mamallapuram Road (OMR), has rattled the residents.

Crows falling from trees, on residential apartments and public places like parks has triggered concern and alarm.

Since these places fall under Kancheepuram district, officials from the Animal Disease Investigation team from there rushed to these places, collected samples and sent them for analysis to the Bhopal-based National I...