Hong Kong police say they've arrested over 200 people over suspected involvement in unauthorized gatherings. They say protesters blocked traffic and disrupted social order. Demonstrators are against a proposed national security law for Hong Kong region, claiming it would undermine the region's freedoms. The central government, however, says the legislation only aims at tackling secession, subversion and terrorist activities. Police have also been deployed outside Hong Kong's legislature complex, after calls were made for protesters to derail a second reading of a bill, that would criminalize abuse of the Chinese national anthem