A member of the K-pop band BTS tests positive for Covid.

SEOUL — Suga, a member of the global K-pop phenomenon BTS, has tested positive for the coronavirus, the group’s management company said on Friday.

The company, Big Hit Music, said in a statement that Suga, 28, who returned to South Korea from the United States on Thursday, discovered on Friday that he was infected while in quarantine and after taking a P.C.R. test.

He had tested negative before traveling to the United States, the statement said, and had received his second vaccine dose in August.

The singer had no contact with the other members of BTS — RM, Jin, J-Hope, Jimin, V and Jungkook — the statement said. Suga was not displaying any symptoms as of Friday, and he was isolating at home, the company said.

The news comes a month after another K-pop megastar, Lalisa Manoban, 24, of Blackpink, better known as Lisa, also tested positive for the coronavirus. The other members of Blackpink — Jennie, Jisoo and Rosé — tested negative for the virus, the production company, YG Entertainment, said in an emailed statement last month.

Suga, the stage name for the artist Min Yoon-gi, made his debut with BTS in 2013. The Korean pop group, a multibillion-dollar act, is known for dynamic dance moves, catchy lyrics and fiercely devoted fans.

In 2018, BTS became the first K-pop group to top the Billboard album chart, with “Love Yourself: Tear.” In September this year, the group gave a speech at the U.N. headquarters in New York, promoting coronavirus vaccinations and praising young people for their resiliency during the pandemic.

Suga has stepped out for solo projects, sometimes performing as Agust D, and as a commercial producer. In an interview with GQ Australia that was published this week, he said: “All three are me. They each take up a third of myself, and one isn’t more reflective of me than another. I simply give people a choice. These three sides of myself are incredibly different, so I’m giving people a choice to see me as they want.”

This week, Billboard’s Charts reported that Suga and Juice WRLD, the stage name for the artist Jarad A. Higgins, had the best-selling song in the United States with “Girl of My Dreams,” the first time a song by either artist to hit No. 1 on any chart, according to Yahoo News. Juice WRLD died in December 2019, and the song is part of the artist’s posthumous album, “Fighting Demons.”

John Yoon contributed reporting.