An IOPC spokesperson said: "We can confirm that we are independently investigating the circumstances of a 27-year-old man’s death following his arrest by Border Force officers at Manchester Airport on Wednesday 19 February.
"Our investigation follows a referral from the Home Office which detailed how the man was due to travel from the airport on Wednesday and was stopped after displaying unusual behaviour.
This comes after two brothers charged over a brawl at Manchester Airport that sparked protests across the country appeared in court last month.
Amaaz, now 20, is accused of two offences of causing actual bodily harm, one charge of assaulting an emergency worker and one charge of common assault.
A MAN has died at Manchester Airport after "behaving unusually" while being detained by Border Force officials.
