Vietnamese authorities are conducting intensive contact tracing after the country’s first confirmed local transmission of the coronavirus in 89 days.

State media said Tuesday that a 32-year-old man in Ho Chi Minh City tested positive for the coronavirus on Monday after visiting a flight attendant who was undergoing self-quarantine at his home following his return from Japan two weeks ago. The flight attendant tested positive on Saturday, the Tuoi Tre newspaper said.

Health authorities ordered 137 people who had been in close contact with the man to stay in a central quarantine facility and shut down an English center where the man works as a teacher, the newspaper said.

The new case ended Vietnam’s streak of 89 days without any known local transmission of the virus. Earlier, it went 99 days without local transmissions until a cluster of cases broke out at a hospital in Da Nang in central Vietnam in July.

Vietnam’s borders remain closed in an attempt to keep out the virus. Only limited international flights are operating to repatriate Vietnamese nationals and transport foreign diplomats and experts.

The country has reported 1,347 coronavirus cases, including 35 deaths. Nearly half of the confirmed cases were imported, according to the Health Ministry.

(AP)