Police in Hong Kong have arrested pro-democracy activists on the anniversary of the Tiananmen Square massacre. Authorities have banned public commemoration of the 1989 incident, which saw China crush peaceful protests in Beijing with tanks and troops.

Police in Hong Kong arrested four people and detained another four pending an investigation on the eve of the 34th anniversary of the Tiananmen Square protests and massacre in Beijing. Police said in a release that four people were arrested for alleged “disorder in public spaces” or for acting “with seditious intention.

China has tightened access to Tiananmen Square in central Beijing on the anniversary of 1989 pro-democracy protests. In Hong Kong, which had been the last Chinese-controlled territory to hold

With candlelight vigils to the victims of the 1989 crushed student uprising in Beijing now only a memory, the anniversary is also a reminder of the freedoms Hong Kong has lost.

Many Hong Kongers are trying to mark the event in private ways because it is unclear what authorities might consider subversive.

Hong Kong boosted security around a park Sunday where tens of thousands of people used to gather for an annual memorial of the bloody Tiananmen Square crackdown, ensuring no protests on the event's 34th anniversary.

Police questioned people in the streets and Alexandra Wong and at least seven others were detained