A migrant was pinned against a fence and dragged away as he tried to shout for help, claiming he had been held at Manston immigration processing centre for 30 days.
The man started shouting "help" repeatedly and waving towards media cameras placed outside the Kent side.
Staff members asked him to stop shouting after he claimed he had been at the site for 30 days.
However, he did not stop and was then seen by photographers being pinned against a fence by four or five staff members before being dragged away from the cameras.
It comes after hundreds of protestors braved pouring rain to demand the closure of the centre on Sunday.
Action Against Detention And Deportation demonstrators chanted and banged metal pots outside the Manston migrant centre.
The dangerously overcrowded centre faced critics and a video obtained by the Sunday Mirror last week week showed horrific living conditions refugees endure.
Footage of the site, 20 miles from Dover, shows detainees sleeping on mats on the wooden floor of a marquee as temperatures plunge.
One insider told us: "These conditions seem more like a third-world country than something you'd expect to see in Britain. It's appalling."
Milder weather means children can be heard playing from inside the compound, a former Ministry of Defence fire training centre.
The site is now back to a safe occupancy level of 1,600 people after reaching a high of 4,000 last week.
One local, who was walking past when the incident happened and wanted to remain anonymous, said he felt for the staff working there as the migrants inside "play up" when they know journalists are outside.
He also commented that he did not have faith in Home Secretary Suella Braverman, deriding her desire to bev"photographed on the front page of the Telegraph waving away a plane taking migrants to Rwanda".
He added: "That deal just means we have to take people from Rwanda so there's no benefit to us."
The incident occurred shortly after a group of MPs from three parliamentary committees visited the site after concerns were raised about overcrowding.
Anum Qaisar, the SNP MP for Airdrie and Shotts who sits on the Commons Women and Equalities Committee, told reporters afterwards: "I saw young children in tents, and the reality is that the Home Secretary has a lot to answer for."
When asked if she believed the conditions at Manston had improved, she added: "I don't trust the Tory government."
Members of the Commons Home Affairs Committee and the Joint Committee on Human Rights also attended.
Dame Diana Johnson, chairwoman of the home affairs committee, said the visit revealed that "while overcrowding has reduced, and staff are making valiant efforts to improve conditions for detainees, the crisis is not over."
She added: "We encountered families who had been sleeping on mats on the floor for weeks.
"Meanwhile, there are ongoing questions about the legality of the Home Secretary's decision to detain people at the site for longer than 24 hours.
"The Home Office has been running to keep up with this escalating crisis, rather than warding it off at the outset through planning and preparation.
"The number of people crossing the Channel in small boats this year will not have been a surprise to the Government, so why were adequate preparations not made?
"This question matters – because we may still see another major upsurge in the number of people arriving at Manston before the end of this year.
"The Home Secretary needs to end this crisis once and for all. That requires dealing with the backlog in the asylum system and establishing a system that is efficient and fair."
A Home Office spokesman said: "The Home Secretary has taken urgent decisions to alleviate issues at Manston and source alternative accommodation.
"We take the safety and welfare of those in our care extremely seriously and all basic needs are provided for including hot food, fresh clothing, sanitary packs, and medical care where needed.
"Thanks to our hard-working staff, Manston remains resourced and equipped to process people securely and keep the public safe while we find alternative accommodation as soon as possible."
