Boris Johnson says the UK’s extradition arrangements with Hong Kong will be changed, amid rising tensions with China.
Foreign Secretary Dominic Raab will announce on Monday the suspension of the treaty in parliament, the Times and Daily Telegraph newspapers said, citing sources.
Raab is due to speak in parliament at 14:30 GMT.
UK Prime Minister Boris Johnson said changes would be announced later in the day to reflect concerns over the security law, but did not specify what those changes would be.
“We’ve got to have a calibrated response and we’re going to be tough on some things, but also are going to continue to engage,” Johnson told reporters.
Earlier on Monday, Chinese foreign ministry spokesman Wang Wenbin urged Britain to “stop going further down the wrong path”.
The UK handed Hong Kong back to China in 1997 but, as part of an agreement signed at the time, it enjoys some freedoms not seen in the mainland.
But political and economic relations between the UK and China have become strained in recent months.
Earlier this month, the UK decided to ban Chinese tech firm Huawei from its 5G network, citing security concerns denied by the company.
The UK, US and EU have accused Beijing of undermining the “One Country, Two Systems” principle, which has guaranteed a high degree of autonomy for Hong Kong since it was handed back to Chinese rule in 1997.
They say the security laws which came into force last month breach the terms of the 1984 Joint Declaration protecting political and economic freedoms – which agreed the conditions under which Hong Kong would be run when Britain gave it back to China in 1997.