Aung San Suu Kyi, the Myanmar leader overthrown in a military coup two days ago, was on Wednesday charged with violating a trade rule, a party spokesman said.
A court "ordered her to be remanded in custody for 14 days from February 1 to 15, accusing her of violating an import/export law," National League for Democracy (NLD) spokesman Kyi Toe wrote on Facebook.
The violation is allegedly over illegally-imported radios.
Former president Win Myint has meanwhile been charged with violating the Natural Disaster Management Act, Kyi Toe added.
The military seized control of the country on Monday and detained Suu Kyi, the country's de-facto leader, as well as hundreds of other lawmakers.