Eleven Britons, including two with dual British-South African nationality, have been arrested in northern China, the Foreign Office has confirmed.
UK officials said they were "seeking further clarification" on the reasons for the arrests.
The ages and identities of those held have not been made public.
A Foreign Office spokesman said: "Consular staff have visited the group to provide assistance and we are liaising with Chinese authorities."
It is not clear when the arrests were made.
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