Scenes outside law firm Ho Tse Wai and Partners -- a firm known for taking on human rights cases. An American citizen John Clancey, who works for the firm, was among those arrested in Hong Kong on Wednesday under a new national security law imposed by Beijing, two sources told AFP.

Clancey is the first American national detained under the new security law in Hong Kong since its imposition in late June last year. IMAGES outside building where law firm Ho Tse Wai and Partners is located

SARAH LAI / AFPTV / AFP