Dozens of bottles containing dangerous chemicals, including highly corrosive acids, were discovered at a country park in Tsuen Wan on Thursday, prompting Hong Kong police to investigate if the substances had been stored there by anti-government protesters . Police found 59 bottles, containing 137 litres of chemicals, at a hillside near Shing Mun Reservoir off Shing Mun Road in Shing Mun Country Park at about 11am acting on a tip-off. Officers from Police Tactical Unit and Identification Bureau, along with firefighters, took part in the search. Chief Inspector Wong Tsze-wai of Narcotics Bureau said the haul, consisting of 20 types of chemicals, was found hidden in the bushes at a hillside. Initial examination showed the dangerous goods included acids, such as sulphuric acid and nitric acid, and other corrosive solutions. “We don’t rule out if a part of the seizure is linked to the theft of chemicals from Chinese University,” he said. Chinese University is said to have lost about 80 litres of concentrated nitric acid, 17.5 litres of concentrated sulphuric acid, and 2.5 litres of hexane. “Criminals could have used the dangerous goods to make petrol bombs, acid bombs, and other weapons,” Wong said. He said the consignment posed risk to the public as it was left in an area hikers could easily have bumped into. Wong said no leakage was found from the bottles seized at the scene, while some bottles had not been opened either. As the chemicals were found near a reservoir, the Water Supplies Department would make an appropriate follow-up action, the chief inspector said. One police source said the case was being investigated by the crime unit from the police headquarters, a department that has been handling crimes related to anti-government protests that has roiled the city since June. Personnel from the Police Tactical Unit were also deployed to scout the area and firefighters were on standby. As of midday on Thursday, the area was still cordoned off by police. Meanwhile, police said on their Facebook page on Wednesday night that they had seized about 10,000 petrol bombs from Chinese University, Polytechnic University, and other colleges and their surroundings, along with a large number of chemicals, offensive weapons, and raw materials for explosives. “Violence will not be condoned in any civilised society,” police said in the post. “One should call a spade a spade. There’s no room for grey areas. Police are making every effort to put an end to violence by enforcing the law.” After a 13-day siege of PolyU occupied by more than 1,000 protesters, police last Friday seized 4,296 petrol bombs, 671 bottles of chemicals and 622 pieces of weapons. Some 810 people were arrested when leaving PolyU during the siege, while police took the details of a further 318 youngsters aged under 18. A source had earlier told the Post that about 20 types of chemicals were reported missing from PolyU in Hung Hom, including 2.5 litres of concentrated sulphuric acid; 1kg of sodium metal; a small amount of zinc cyanide; sodium arsenite; hydrochloric acid; and DDT, an insecticide known for harmful environmental impacts. Protesters also occupied Chinese University for five days in November, during which they threw objects onto a nearby highway and railway tracks, and attacked police with petrol bombs and other weapons. Police responded with more than 1,000 rounds of tear gas during the clashes. The occupiers fled on November 15. In Hong Kong, the months of social unrest began in June with protests against the now-withdrawn extradition bill that could have led to fugitives being sent to mainland China and other jurisdictions with which Hong Kong has no exchange arrangements. Till December 2, police arrested 5,947 people aged between 11 and 83, including 4,415 males and 1,532 females, for offences, such as rioting, unlawful assembly, arson and possession of offensive weapons.