BBC The tour group, most of whom were Muslim and included doctors, businesspeople and elderly couples, were detained on 10 July.
'In a statement on its Facebook page it said the tour went "horribly wrong" when the party was arrested at Ordos Airport last Friday.
'"They were detained without charge with no access to any communication nor to legal representation.
Chinese, now trying to find reasons for the detention, suggested that
some members were linked to a terror group, to a banned organisation, to
watching propaganda videos in their hotel room."'