The XBB 1.16 variant was first found in January when two samples tested positive for the variant while in February a total of 59 samples were found.
There is mounting evidence that suggests that Omicron subvariants BA.4 and BA.5 are infecting people who have been vaccinated.
"The Omicron variant has so far been identified in 13 of the positive tests. The investigation has not yet been completed. The new variant may be found in more test samples," the National Institute for Public Health (RIVM) said in a statement.
Among other things -- including enhanced testing, maintenance of covid appropriate behaviour, identification of hotspots and adequate availability of health facilities -- the Health Secretary also asked the states that all positive samples of travellers from at risk nations should be sent for genome sequencing.
Earlier, Delhi Chief Minister Arvind Kejriwal urged Prime Minister Narendra Modi to stop flights coming to India from those countries which are affected by the new variant of the coronavirus.
In view of the new COVID-19 variant Omicron which has been identified as a variant of concern, the Maharashtra government's new order, released on November 27 detailed the guideline for international travellers into the state.