A second detainee at Campsfield House has been quizzed over a fire which helped 26 inmates escape.
Police arrested a 30-year-old man yesterday at the detention centre near Kidlington on suspicion of arson with intent.
He has been bailed back to the detention centre by police pending further enquiries until August 29.
A 29-year-old man arrested by police on suspicion of arson with intent last week has been released without charge and handed back to the Borders and Immigration Agency.
During the fire on Saturday, August 4 a total of 26 detainees escaped.
Ten are currently still on the run.
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