The crisis-hit Baltic state of Latvia said today it was investigating a data leak from its tax office, which public television reported involved millions of documents and the records of top politicians and businessmen, Reuters reported. An investigative news programme on public television reported on Sunday that a security hole in the state revenue service's electronic declaration system had allowed the illicit download of 7.4 million documents, or 120 gigabytes of data, over a period of three months. "The State Revenue Service has information that there has been a possible leak of information from its information system," the tax office said in a statement, declining to confirm the details in the television report. It said it had informed law enforcement agencies and was carrying out internal checks. The television report said the data included information on private companies and public institutions and employees' wages. There was also personal information about top politicians and businessmen, including the personal identification code of President Valdis Zatlers.