There were two separate incidents this weekend.
Sisa News reports that A 26 year-old American native speaking teacher was killed when he was hit by a bus crossing the street at a crosswalk at Dongmak intersection in Incheon's Yeonsu-gu at 2:30pm on Saturday. The driver was apparently making a left turn towards the industrial complex there and was surprised to see the teacher walking across the crosswalk. The teacher arrived in Korea last May and was working at an elementary school in Paju. Police informed his family via the US Embassy and are investigating the 58 year-old driver and trying to determine the exact series of events which occurred.
Meanwhile, Asia Gyeongje, in an article titled 'Foreign English instructor in his 30s falls to death at a pension while drunk,' tells us that a British English instructor fell about 20 meters to his death from a retaining wall at a pension on Jangbong-do (an island north of Incheon Airport) at 8:45 pm on Saturday. He was part of a group of teachers taking part in a travelling club, and the organizer said he heard moaning outside and found the instructor on the ground at the bottom of the stairs. (NoCut News adds that he had head injuries and was moved to a hospital but died after arriving.) Police say that he was walking down the stairs while drunk and lost his balance and fell over the railing. They're still trying to figure out exactly what happened. The teacher was working at a hagwon in Namyangju, Gyeonggi-do.