BBC.co.uk
25 July 2012
Last updated at 16:44 ET
The UK Border Agency is trying to establish how two detainees scaled the rooftops of an immigration removal centre in two separate protests.
Two detainees scaled Morton Hall in two days
The first climbed a building at Morton Hall, in Swinderby, Lincolnshire, on Monday evening and the second climbed up at about 11:30 BST on Tuesday.
A BBC reporter spoke to a further detainee who said many were upset with the length of time they had been held.
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