Police are investigating whether they linked up on an Internet suicide site.
According to local investigators, a man and four women were found dead in a car parked in front of the Jangwoi Industrial Complex in Hwaseong, about 50 kilometers southwest of Seoul, at around 1:10 p.m. They were all in their 20s or 30s and had apparently inhaled toxic gas, they said.
Separately, three men were found dead hours later in Chuncheon, about 90 kilometers east of Seoul and 140 kilometers northeast of Hwaseong.
Police said both groups were found with burnt briquettes, and suspect a possible link between the two. Officers have found evidence that one of the women in the first group sent online messages to the rest asking them to join her on "D-day." If verified, the incidents may be the latest in a series of suicides among youngsters who use the Internet to find like-minded people.
link: Group suicides create stir again http://www.koreatimes.co.kr/www/news/nation/2010/05/117_65847.html