ATHENS, Greece (CNN) -- European Union officials said Monday that bird flu had been found on one of the Greek isles and tests were being conducted to determine if it is the deadly H5N1 virus.The European Commission said Greek veterinary authorities had informed it of a suspected case of avian influenza on the island of Inousses, based on a serological test that proved positive for the presence of avian influenza H5 antibodies.The samples were in the process of being sent for confirmation and virus isolation tests at the Greek national reference laboratory in Thessaloniki, and the European Commission said it had requested that samples also be sent immediately to the Community Reference Laboratory in Weybridge, England.The commission said it is preparing to ban the movement of live poultry and poultry products from the infected area in the Chios region.The EU said its ban would be adopted as soon as the Greek national reference laboratory confirmed the results, expected Tuesday.The EU said following consultations between the commission and the Greek Ministry of Agriculture, Greek authorities had agreed to restrict the dispatch of live poultry and poultry products as a precautionary measure.Monday afternoon the mayor of the island of Chios said a farmer on nearby Inousses who raises turkeys and chickens noted on Thursday that some of his birds had died.Two state veterinarians were sent in to look at nine turkeys. They also took blood samples from some chickens.The mayor said a state lab in Athens confirmed Monday afternoon that one of the nine samples proved positive for an H5-type virus.The Romanian government confirmed Saturday that the H5N1 strain of avian influenza had been confirmed in Romania, the first instance of the lethal strain known to have reached Europe.A statement posted on the government Web site said the strain had been confirmed. Its existence in Romania bolsters the theory that the virus may be spread by migratory birds.On Thursday, the European Union said the H5N1 strain had been confirmed in Turkish poultry, and said the virus "is H5N1 closely related to a virus detected in a wild bird in central Asia a few months ago."The EU said then that the strain likely would be found in Romania, and the European Commission said it would ban imports of live birds, poultry meat and other products from Romania. Imports of live birds and feathers from Turkey were banned earlier in the week.Despite the fact that 117 people in Asia have been infected by the strain and 60 have died, H5N1 in its current form does not easily infect humans.However, officials fear it could mutate into a more easily transmissible strain and result in a global pandemic.Journalist Anthee Carassava in Athens conributed to this report