An employee of Mizuho International plc employee has been arrested in London in connection with insider trading, a document posted on the U.K. Financial Services Authority homepage shows.

A Mizuho Securities Co. (8606.TO) spokesman confirmed the arrest had been made, but declined to provide further details.

A 37-year-old man and a 28-year-old woman have been arrested as part of the investigation. It remains to be seen whether the FSA investigation is connected with a probe on suspicious trading that was launched by Japanese financial regulators.

Mizuho International is the London-based arm of Japan's second-largest bank Mizuho Financial Group Inc. (8411.TO).

-By Kana Inagaki, Dow Jones Newswires; 813-6269-2795; kana.inagaki@dowjones.com