International police agency Interpol today urged Internet users to help track down hundreds of fugitives wanted for murder, rape, child sexual abuse and other serious crimes.The round-up operation has been launched targeting 450 people either convicted or suspected of serious offences and wanted by, or believed to be located in, 29 countries. The agency based in the French city of Lyon said in a statement that the operation has been very successful in locating and arresting a large number of these targets, but what it is now left with are the cases where it has no new information on their whereabouts, which is they are are asking for the public to help.Interpol has released to the public pictures of 26 fugitives to back its appeal for help from Internet users, especially on social networking sites and chatrooms.Information on the whereabouts of the fugitives or any internationally wanted person can be sent to fugitive@interpol.int, or be given anonymously to national Crime Stoppers programmes or via www.csiworld.org.