Picture from this article.
The Korea Times reports seven teachers were killed last night.
The accident occurred at around 10 p.m. when a bus rear-ended a passenger car and about nine other vehicles, including those parked at roadside in Suyu-dong. Gangbuk-gu. The exact number of cars involved was not immediately known.
All the seven occupants of the Avante car were killed after moving to a nearby coffee shop after a dinner meeting, the police said, without giving details about the conditions of the injured.
A poster on Dave's says they were accountants and office workers, not teachers. To echo the comments on the article, my condolences, but there shouldn't have been seven people in an Avante. More in Korean here, and here's another photo.
* Update: Here's a little update a few days later.