Two foreign returnees, who had tested positive for COVID-19, on Wednesday were found to have been infected by the Omicron variant, a senior health official said.

One of them had returned from Nigeria and the other from the United Kingdom, he said.

"We have received genome sequencing results for three samples today and among them, two were positive for Omicron strain. The other was suffering from the delta variant," he said.

One of them, a 19-year-old boy, came from London on Sunday, said an official of a private hospital where he is admitted.

"His condition is stable, he has cough and cold," said the official.

The other patient is also a minor, sources said.

Earlier, a seven-year boy who had returned to the state from Abu Dhabi via Hyderabad, had tested positive for the Omicron strain.