File Photo: Agencies. 

PHNOM PENH, Nov. 6 (Xinhua) -- Cambodia's Ministry of Health (MoH) said on Friday that a total of 840 people, who came in contact with infected Hungarian Minister of Foreign Affairs and Trade Peter Szijjarto, tested negative for the COVID-19 pandemic.

In its press statement, the MoH said 628 people were tested on Wednesday and 212 others on Thursday, and the results showed that all of them were negative for the virus.

Although they have not contracted the COVID-19 in their first testing, the MoH has advised them to go on a self-quarantine at home and to undergo three more tests to ensure that they are free of the virus, the statement said.

The next three tests will be conducted on Nov. 9, 14 and 18, it added.

The mass testing came after Szijjarto, who visited Cambodia on Tuesday, tested positive for the COVID-19 on Wednesday after arriving in Thailand on his Asian tour.

During his one-day visit to Cambodia, Szijjarto met with Cambodian Prime Minister Samdech Techo Hun Sen, Foreign Minister Prak Sokhonn, Commerce Minister Pan Sorasak, Agriculture Minister Veng Sakhon and Parliamentarian Sous Yara, among others.

Hun Sen, who has been self-quarantining for 14 days at home, said that he and his wife Bun Rany as well as bodyguards and chauffeurs, totally 18 people, had undergone first testing for the COVID-19 and the results came out negative.

He added that he and those involved will undergo the next three tests as required by the MoH.

"Prevention is better than a cure. We must work together to prevent the COVID-19 from infecting us, our families, our community and our country," he wrote on his official Facebook page on Thursday.

According to the MoH, the Southeast Asian nation detected no new COVID-19 cases on Thursday and the kingdom's total cases remain at 292, with 286 recoveries.