China's Macao Special Administrative Region (SAR) on Monday reported its first imported COVID-19 case of the Omicron variant of the virus, bringing the SAR's total number of confirmed cases to 78.

The new case was a 23-year-old male Macao resident who left the United States on Thursday and arrived in the SAR on Saturday via Singapore, said the Novel Coronavirus Response and Coordination Center of Macao.

The man tested positive for COVID-19 upon arrival in Macao and developed coughing and phlegm symptoms on Monday, the center said.