"We will consider necessary measures and continue with the investigation without wavering," special prosecution spokesman Lee Kyu-chul told reporters during a briefing, without elaborating. He did not take questions.
The Seoul Central District Court earlier on Thursday dismissed a warrant to arrest the 48-year-old Lee, who was named a suspect as part of an investigation into the political scandal that has led to the impeachment of President Park.
(Reporting by Ju-min Park and Se Young Lee; Editing by Lincoln Feast)