New Delhi: To protect birds and avoid fatal accidents, the Delhi government on Tuesday banned nylon, plastic and Chinese 'manjha' and any other sharp kite-flying thread. "A lot of injury is caused to the people and birds on account of pucca thread made of plastic or similar such synthetic materials commonly known as Chinese threads," the government said in a notification. The government said that kite flying shall be permissible only with a cotton thread or natural fibre free from any metallic of glass components, used to sharpen the threads for kite competition. "The activity of the birds is at peak from 6 to 8 a.m. in the morning and from 5 to 7 p.m. in the evening and it is desirable to protect the innocent birds including the vultures which are getting extinct day by day from the fatal manjha," the order said. The ban is on the the sale, production, storage, supply and use of nylon, plastic and Chinese manjha and any other kite-flying thread which is sharp or made sharp by being laced with glass, metal or other sharp objects.