The force also said its Anti-Deception Coordination Centre managed to stop more than HK$600 million from ending in fraudsters’ pockets.

Overall, Hong Kong recorded 30,871 crimes in the first half, down 4.6 per cent from 32,345 cases in the same period last year.

Violent crimes such as arson, and wounding and serious assault, registered falls of 44.6 per cent and 15.7 per cent respectively.

The number of young people arrested also dropped 34.1 per cent. For the first six months, 1,519 youth aged 10 to 20 were arrested, down from 2,306 over the same period in 2020.

Hong Kong police arrest student, seize weapons in raid on Kwun Tong flat

Arrests for drug offences, however, involving young people rose about 66 per cent. And the number caught for criminal damage and triad-related offences also increased 32 per cent and 11.2 per cent respectively.

In a seminar on the national security law earlier this month, Secretary for Security Chris Tang Ping-keung, warned the social unrest of 2019 had lowered young people’s respect for the law.

According to police figures, 2,769 young people were arrested for various crimes in 2018. The number jumped 43 per cent to 3,987 last year.

“Police will continue to pursue interdepartmental and multi-agency collaboration in developing and strengthening law-abiding awareness among youths,” the force said.

Seizures of five major illegal drugs – cocaine, cannabis, crystal meth, ketamine and heroin – rose 63 per cent to about 3.68 tonnes in the first six months, from around 2.25 tonnes a year earlier.

Ecstasy seizures also rose sharply to 21,770 tablets, up 745 per cent.

The first half also saw a 64 per cent and 36 per cent drop in robbery and burglary cases respectively. Sixty-seven robberies and 741 burglaries were reported.

Hong Kong police seize HK$107 million worth of drugs, arrest 5 in raids

A police source said the fall was mainly because some 6,000 officers, who had been deployed to the riot squad at the height of the 2019 anti-government protests, had returned to their normal duties in the second half of last year as the introduction of the national security law had started to restore peace and order. That meant, the source said, the force could send more officers to carry out additional patrols and various operations to tackle crimes such as break-ins.

Police said the law and order situation was stable.

Lawmaker Cheng Chung-tai, who sits on the Legislative Council’s security panel, said it was too early to say if the fall in youth crime, or overall crime, was due to the introduction of the national security law in June last year.

“After all, 2019 and 2020 were very unusual years.” he said. “With the economy hard hit by the Covid-19 epidemic, we need to wait for the figures for the entire year before jumping to any conclusion.”

But he blamed the security law partly for the rise in deception cases.

Beijing moves official to Hong Kong to ‘coordinate security agencies’

“There were cases when the swindlers claimed they were mainland Chinese national security officers and asked the victims to surrender their money to assist investigations,” Cheng said.

“We can’t blame the victims for being stupid, if someone speaking Mandarin called you and he could tell your name and personal details of your family members, you would probably believe he was secret police from the mainland.”

According to police, 117 people had been arrested for national security offences as of June 30. Of those, 64 were prosecuted.