Hong Kong, Aug. 30 -- A pro-democracy group in Hong Kong said one of its leaders, well-known activist Joshua Wong, was arrested Friday morning.

Wong was pushed into a private car as he was heading to a subway station around 7:30 a.m. and has been taken to police headquarters, the Demosisto group said on its social media accounts. It later said another member, Agnes Chow, had also been arrested, at her home.

Police did not immediately confirm either arrest.

Wong is secretary-general of Demosisto and was one of the student leaders of the Umbrella Movement, the major pro-democracy demonstrations in 2014.

He was released from prison in June after serving a two-month sentence related to that protest. He has been speaking out regularly in s...