France, Dec. 2 -- Two cases of the Covid-19 Omicron variant have been detected in India, the Health Ministry said on Thursday. The news makes India the world's 30th country toconfirmed infections of the strain that has triggered global alarm.

"Both cases are from Karnataka," said health official Lav Agarwal, adding that the patients have not reported any severe symptoms so far.

"All primary contacts and secondary contacts of both the cases have been traced and are being tested."From Wednesday, India has stepped up vigil at airports, revised guidelines for all international passengers travelling and ramped up surveillance and testing.

Several states have moved to implement precautionary measures against the Omicron, initially detected i...