The special prosecution has been investigating whether Samsung provided 30 billion won ($25.28 million) to a business and foundations backed by Park's friend in exchange for the national pension fund's support for a 2015 merger of two Samsung affiliate.

Lee was named a suspect on Wednesday and summoned early Thursday morning for questioning. He will head home at around 8 a.m. local time (2300 GMT), Yonhap reported on Friday.

(Reporting by Se Young Lee; Editing by Chris Reese)