A teenager and his 52-year-old aunt were arrested yesterday after police raided their homes in Wan Chai and seized chemicals that could be made into explosives.
The 16-year-old and his aunt are being held for making or possessing explosive substances after police received a tip they had bought chemicals from overseas via websites from November to April.
The chemicals could be made into bombs, said superintendent Chow Cheung-yau of the police force's financial investigations division.
Among chemicals seized were hydrogen peroxide, the solvent acetone, acids and an oxidizing agent, said Suryanto Chin-chiu of the explosive ordnance disposal bureau.
"They could be made into fireworks or explosives that can cause damage," Chin added. "The chemicals are inflammable." The chemicals were inside poly-foam boxes. Lab utensils were also found.
While some of them could be purchased legally, Chin said, it did not make sense for a normal family to have a dozen bottles of hydrogen peroxide at home.
Chow said it is easy to find information online on how to make explosives. He warned parents to alert the police if they noticed their children were buying suspicious chemicals.
"Upon conviction, the maximum sentence for making and possession of explosives is 14 years' imprisonment," he added.
Officers also seized imitation guns and banners saying "Liberate Hong Kong, revolution of our times."