Two passengers in Bengaluru from South Africa had earlier tested positive for Covid-19. However, both the travellers were found to be infected with Delta variant of coronavirus, and not the newly found strain Omicron. br br State Health secretary T K Anil Kumar said, "We fastened the process of sequencing. Both samples are Delta not Omicron. They are returnees from South Africa in November. Sequencing was done at a Bengaluru lab itself.