An asylum seeker was arrested after three people were reportedly attacked while travelling to a Home Office processing centre.
Police were called to the facility in Manston where they detained a 21-year-old man on suspicion of three counts of assault.
Three people, who are understood to be two Border Force officers and a security guard, were reportedly targeted.
A police spokesman said: "Kent Police officers attended a Home Office facility in Manston on Friday evening and arrested a 21-year-old man on suspicion of assaulting three people during a coach journey earlier that day.
"The man was taken into custody and later released pending further enquiries."
The former MOD site in Thanet started processing asylum seekers earlier this year.
Ministers drew up plans for the former Defence Fire Training and Development Centre in Manston to be repurposed for processing people hoping to claim asylum in the UK.