The Hong Kong Special Administrative Region government will use all feasible means to hunt down fugitives endangering national security for life and not allow them to get off scot-free, the city’s leader said on Tuesday.

John Lee Ka-chiu made the remarks at a media briefing ahead of the Executive Council meeting when asked if the SAR government has asked the Singaporean side to extradite fugitive Nathan Law Kwun-chung back to Hong Kong.

Law, who has been wanted by police on suspicion of committing crimes endangering national security and has a HK$1 million ($127,448) bounty placed on him, had been denied entry into Singapore on Saturday after arriving from the United States, according to media reports.

“He was a designated absconder under the Safeguarding National Security Ordinance,” the CE told reporters, reiterating that the government would pursue him for life.

Emphasizing that endangering national security was a serious crime and no country should harbor criminals, Lee stressed the HKSAR government would strictly enforce the National Security Law and would go after the offenders.