The move came ahead of a hold a South Korean court put on a request
by a group of lawyers for a hearing to question 12 waitresses in the
group whether they had defected of their free will, after the spy agency
refused to present them in court.

South Korea's spy agency has decided to retain 13 North Korean defectors at the heart of a bitter dispute between the rivals, with Pyongyang accusing Seoul of abducting the group from their posts at a restaurant in China, an official said on Tuesday.
The
move came ahead of a hold a South Korean court put on a request by a
group of lawyers for a hearing to question 12 waitresses in the group
whether they had defected of their free will, after the spy agency
refused to present them in court.
"The director of the National Intelligence Service has decided to extend their protection," a South Korean official said, citing a law covering the resettlement of North Korean defectors and concerns for their safety.
"A propaganda campaign by the North"
over the status of the group was a factor in the decision, the
government official told Reuters, requesting anonymity because the topic
is sensitive.
North Korea says the South abducted
the 12 waitresses and the restaurant manager and has demanded their
return, but the South has said the group decided to defect of its own
free will.
The Seoul Central District Court said it had ruled to stay a petition filed by Minbyun, or Lawyers for a Democratic Society, seeking to question the women.
"We don't think it is possible to make a decision without confirming the restaurant workers' intent in this case," Chae Hee-joon, a lawyer for Minbyun, told reporters, adding they had filed a recusal motion to the court, citing the women's absence.
The spy agency has said it will not present the defectors in court and only their legal representatives will attend.
The
intelligence agency has held the group since its April 7 arrival in the
South at a facility it runs on the southern outskirts of the capital,
Seoul, where more than 1,000 defectors from the North stay each year in
the initial stages.
For up to 180 days, they are screened and questioned on their lives in the North.
The
spy agency's decision means the 13 will not be moved to a resettlement
complex where other defectors spend 12 weeks to learn about a vastly
different new life in the South.
South Korea is technically at war with the North because their 1950-53 conflict ended in an armistice, not a peace treaty.