Prosecutors were set to serve a fourth arrest warrant to a former Tokyo Olympic executive for allegedly accepting bribes from a company that sold officially licensed stuffed toys of the games' mascots, sources close to the matter said Tuesday.

Haruyuki Takahashi, 78, who has been at the center of a growing corruption scandal over the selection of Summer Games sponsors, is believed to have received a total of ¥8 million in cash from stuffed toymaker Sun Arrow, the sources said.

He is believed to have forwarded an emailed request from the Tokyo-based company regarding product screening and other details to the organizing committee, according to the sources.