A worker at the UK’s Hong Kong consulate has been detained at the border for allegedly violating the law, China has confirmed.
Media reports on Tuesday said Simon Cheng, who is thought to be from Hong Kong, went missing on 8 August during a business trip.
China’s foreign ministry said Mr Cheng was detained at Shenzhen.
The UK said it was “extremely concerned” and the embassy in Beijing was providing support to his family.
China said Mr Cheng had been detained for 15 days for violating “public security management regulations”, although the foreign ministry gave no details of the alleged offence.
Following large-scale protests in Hong Kong, travellers have reported heightened security measures on the mainland side, with people passing through being subjected to police checks of their mobile phones.
China’s foreign ministry spokesman Geng Shuang said they had made “stern representations” to the UK over comments made since the protests began in Hong Kong.
“We request they stop making these irresponsible statements, stop meddling in Hong Kong’s affairs and stop interfering in China’s internal affairs,” he said.
He said Mr Cheng was a Chinese citizen and his detention was an internal affair.