The man allegedly lied about his origins when he arrived in the UK twenty years ago.
A UK Border Force official has been arrested on suspicion of being an illegal migrant.
The man was detained while working for the Home Office agency responsible for protecting UK borders and his bosses are understood to have responded quickly as soon as doubts were raised about his immigration status, The Sun newspaper reported.
The man is understood to be in his late 30s and arrived in the UK from the Balkans around twenty years ago. The incident comes as Border Force staff are taking part in industrial action, with ongoing strikes at six airports.
The official allegedly lied about where he was from on paperwork to obtain the right to remain in the UK, and the same man is believed to be among four Border Force staff who were arrested over a separate incident on December 6.
The group were arrested on suspicion of misconduct in public office and conspiracy to steal.
Read on below…UK Border Force official arrested for being illegal immigrant