Whole genome sequencing results for two Covid-19 cases with XBB.1.5 were reported by the Institute of Environmental Science and Research (ESR) late last week.
"The detection of XBB.1.5 is not unexpected, following its recent detection in Australia and globally, and our Covid-19 response accounts for the emergence of new variants," the ministry said on Monday.
Kraken was descended from the Omicron XBB subvariant, itself a cross between two earlier strains: BA.2.75 and BA.2.10.1.
The World Health Organization said it has been detected in at least 31 other countries.
