Turkey culled about 1,500 chickens and turkeys overnight to prevent the spread of avian flu after reporting its first outbreak of the disease on a farm near the Aegean Sea, NTV private television said on Sunday. The authorities have also imposed a 3 km (2 miles) quarantine zone around the affected farm, where nearly 2,000 turkeys died of the globally feared disease on Tuesday and Wednesday, the station said. "At the moment this is not a situation which should cause (ordinary citizens) any worry. At the moment, there is no question of having household pets put down," the state Anatolian news agency quoted local official Resul Celik as saying.