By KIM TONG-HYUNG
SEOUL, South Korea (AP) — South Korea is tightening recently relaxed restrictions on social gatherings as it grapples with its worst wave of the virus since the start of the pandemic. Starting next week, private social gatherings of seven or more people will be banned in the densely populated capital Seoul and nearby metropolitan areas, which have been hit hardest by a delta-driven spread that threatens to overwhelm hospital capacities. Gatherings will be limited to eight people in areas outside the capital region. Adults will also be required to verify their vaccination status through apps to use restaurants, movie theaters, museums, libraries and other indoor venues.