Hong Kong police defuse powerful pipe bomb in flat and arrest three men, including two with ‘links to radical protest group’

• Two suspects, tertiary students aged 21 and 22, arrested in Mong Kok and police believe they have links to a radical anti-government protest group
• Third man, a 29-year-old electrician, detained in Sheung Shui in what police called a makeshift laboratory where bombs were being made