SEOUL, South Korea (AP) _ Nobel laureate Jody Williams arrived Monday for a four-day visit aimed at pushing South Korea to sign a treaty to ban land mines.

``We've come to learn more about the situation in Korea and also to show our support for Korean civil efforts to ban land mines,'' she said at Kimpo Airport outside Seoul.

Invited by a civic organization, Williams plans to meet with government officials Tuesday. On Wednesday, she will visit the Demilitarized Zone separating South Korea and North Korea.

An estimated 1 million land mines are planted inside the 155-mile-long, 2.4-mile-wide buffer zone. Activists say land mines have killed or injured 84 people in South Korea in the past five years.

Williams won the Nobel Peace Prize for her land mine work, which contributed to 89 nations signing a treaty banning mines.