His death is the first fatality of a migrant being detained at the Manston immigration centre, which was established in February this year in a bid to help deal with the large influx of undocumented asylum seekers making the treacherous crossing from France.
More than 40,000 migrants have arrived in Kent this year, the highest volume seen in recent years.
The Home Office has faced criticism for keeping more migrants at the centre than it has capacity for, for longer than 24 hours due to accommodation shortages. After a peak of 4,000 detainees, the number now stands around 300.
The conditions at the former RAF base were previously described by inspectors as “wretched”, with recorded outbreaks of diseases such as diphtheria and scabies.