A total of four cases of the B.1.1.1.529 or Covid-19 Omicron variant have been detected in Sarawak, Universiti Malaysia Sarawak (Unimas) Institute of Health and Community Medicine (ICHM) director Prof David Perera said.

Perera said two of the cases were reported in Bintulu, involving a 52-year-old man who had returned from Nigeria and underwent a swab test on Dec 19, and a 19-year-old male returning from the United Kingdom who did a swab test on Dec 14...