Six more members of a Hawai'i study trip to South Korea have confirmed cases of swine flu, and are expected to remain quarantined in a Seoul hospital through the weekend.

The five students and a chaperone were found to be carriers of the virus, but are not exhibiting symptoms, said Ruth Limtiaco, a spokeswoman for the Pacific and Asian Affairs Council, which organized the trip. She said the group has been told it will be released from the hospital as early as Monday.

With the latest confirmed cases, a total of 11 of the 25 people on the trip have been found to have swine flu.

Another chaperone on the trip is staying at a different hospital after coming down with pneumonia. The chaperone is expected to be in the hospital until Wednesday.

The Korean consulate in Honolulu said the chaperone also has swine flu. Limtiaco could not confirm that, however.

Meanwhile, four other students on the trip already diagnosed with swine flu remain in quarantine at Seoul National Hospital. The four and one other student were sent to the hospital Monday, when thermal imaging cameras at Seoul's Incheon International Airport determined they had temperatures of about 100 degrees. All incoming airline passengers to South Korea are thermally scanned for fevers as part of efforts to stop swine flu.

In all, there are 25 people on the trip — 19 Hawai'i high school students, two students who graduated from high school this year and are producing a documentary on the trip, and four chaperones.

All of those who have confirmed cases of swine flu are apparently not showing any symptoms.

PAAC officials have said the students in quarantine feel fine, and are anxious to start sightseeing.

Limtiaco said that yesterday was the first day those on the trip who hadn't been quarantined at hospitals were allowed to leave their Seoul hotel rooms. The 11 students and two chaperones who did not have swine flu had been contained in their rooms over fears they could be carriers of the H1N1 virus.

Also yesterday, one student who had been at National Hospital since landing in Seoul was released from quarantine and rejoined the study group, which took a tour yesterday of the demilitarized zone that separates North and South Korea.

Limtiaco said two other students quarantined at National Hospital will be released over the weekend, one tomorrow and one on Sunday, and two will be released Monday.