Hong Kong police on Wednesday arrested four members of a pro-democracy group that organises the annual June 4 rally to commemorate those who died in the bloody 1989 Tiananmen Square crackdown, in the latest blow to the Opposition movement.

Activist and barrister Chow Hang Tung of the Hong Kong Alliance in Support of Patriotic Democratic Movements in China was arrested along with three others, the group said.

“I want to tell Hong Kongers that we need to continue to resist, don’t surrender to the unreasonable power quickly and easily,” Chow told mediapersons on Tuesday when she went to police headquarters to tell officers she would not provide information they had requested.