Nepalese doctors accompanied with rapid response team (RRT) culled over 1,200 chickens on Monday in a poultry farm after a dead chicken tested positive with H5N1 bird flu virus, said Dr. Ram Parichhan Sah who is the coordinator of RRT.

According to poultry farm owner Hom Bahadur Khadka, he had farmed a total of 2,000 chickens in his three separate farms and out of them 800 had already died.

He has his poultry farm at Bode village in Bhaktapur district, which is just 13 kilometres away from Kathmandu, the capital city of Nepal.

"A week ago my chicken started to die one after another and when I sent a sample of the dead chicken for the lab test, it was later proved H5N1 virus," said Khadka.

"Our lab test on some dead chickens at the Central Veterinary Laboratory in Kathmandu confirmed that chickens were attacked by H5N1," Dr. Sah told Xinhua by phone.

Dr. Sah said chickens farmed by Khadka were tested positive with the virus on October 13.

After the confirmation of the virus, a 10-member doctor team with chicken culling experts reached the site at Bode village and culled over 1,200 chickens on Monday.

Senior veterinarian Narayan Prasad Ghimire who was deployed at the chicken culling site said all the chickens were buried en masse in a large ditch after killing them all.