A three-day carnival co-hosted by 26 pro-Beijing groups is being held in Hong Kong’s Victoria Park to mark 26 years since the city's return to Chinese rule. Day two of the event falls on the 34th anniversary of the Tiananmen Square crackdown, which for decades had been marked in the park's football pitches with a candlelight vigil that drew tens of thousands. Police have increased their presence around the park, urging residents to keep walking and taking away at least 10 people, including the leader of the League of Social Democrats, a political opposition party. On June 3, police arrested four people in the area, who they later said were carrying seditious materials.