New Delhi, Sept. 10 -- The Delhi zoo has not recorded any avian influenza death over the past 72 hours, officials said on Tuesday while refusing to confirm how long the ongoing closure would continue. The zoo was shut on August 30, after lab tests confirmed bird deaths due to avian influenza (bird flu). Twelve deaths were reported between August 24 and September 9. In a press note on Tuesday, the zoo said, "The National Zoological Park (NZP) informs that no new mortality has been reported in the last 72 hours among the water birds in zoo enclosure or in the migratory birds around the ponds." ".total 09 numbers of Painted Stork and 03 numbers of Black-headed Ibis died in water bird aviary/ isolation ward out of which 07 nos of samples were found positive for H5N1 Avian Influenza Virus," it confirmed. Besides, two birds are recovering in the ward. Zoo director Sanjeet Kumar said, "Till date a total of five migratory painted storks have been reported dead in the water pond, of which three samples were found positive. No death of migratory birds has been reported after September 1." Environmental samples have been collected from zoo and sent to National Institute for High Security Animal Diseases, Bhopal....