The Ministry of Health on Saturday reported the third Covid-19 case in less than two weeks, bringing the total to 125.
The man, a 26-year-old from Tbong Khmum province's Tbong Khmum district, arrived at the O'Beichoan border checkpoint in Banteay Meanchey province on Thursday.
He is among a group of 10 who returned from a religious school in the Thai southern province of Yala. He is being treated at the Cambodia-Japan Friendship Hospital in the province while the rest tested negative but remain quarantined.
The latest case was found the same day a 39-year-old Cambodian woman – who tested positive on May 22 after returning from New York City, one of the US' Covid-19 hotspots – was discharged from hospital.
Another 26-year-old Cambodian man, who tested positive on May 21 after returning from the Philippines, remains hospitalised.
While urging the public to stay vigilant despite the Kingdom's relatively low number of infections, Ministry of Health spokesperson Or Vandine has said the latest cases do not represent a second wave.