A Wells Fargo executive who was born in Shanghai and works in Atlanta has been detained in China for reasons unknown. Chenyue Mao, a managing director at Wells Fargo, has been banned from leaving the country,

Wells Fargo & Co. suspended travel to China after one of its top trade financing bankers was blocked from leaving the country, the latest case of authorities imposing exit bans on staff of foreign firms.

BEIJING/SHANGHAI/SYDNEY (Reuters) -Fears that employees of foreign firms risk entanglement with Chinese authorities have resurfaced after news that an employee of U.S. bank Wells Fargo has been banned from leaving the country.