The Home Office has denied reports that people sent to a migrant camp in Sussex are leaving it and heading to London.
Home Office minister Mike Tapp said such conduct by asylum seekers being housed at the Crowborough centre would not be “acceptable”.
The first asylum seekers moved into the former army barracks in East Sussex at the end of January.
Mr Tapp said around 50 people were currently at the former military base which is being used as the Government seeks to end the use of migrant hotels.
The Crowborough accommodation has 24/7 security with CCTV.
Its residents are not detained but they have to sign in and out at the front gate.
Asked on LBC radio on Friday morning about local reports that migrants were “checking out” of Crowborough and coming back to London, Mr Tapp said: “That’s not something that I’ve heard.
“But what I do know is that there are strict security procedures around signing in and signing out.
So, I will look into that…that would not be acceptable of course.”
Mr Tapp added: “We have to ensure that people are where we put them so that we can then either deport them, remove them or of course ensure they have got asylum support if they are granted that status.”
The Home Office later denied that people, rather than staying at the Crowborough camp as expected, were leaving it.
“This is untrue,” said a spokesman.
All residents at the Crowborough centre were accounted for, according to Home Office sources.
The Crowborough Training Camp can accommodate up to 500 adult male migrants while their claims for asylum in the UK are being processed.
Local residents have protested at its use as a migrant centre.
The Government has vowed to end the use of hotels to house asylum seekers by the end of this Parliament and announced plans to use the Crowborough base and Cameron Barracks in Inverness, Scotland as part of these efforts last year.
More than 400 migrant hotels were opened under the last government at a cost of £9m a day, according to the Home Office.
Now just under 200 remain in use, with overall asylum costs down 15%, a Home Office spokesperson said
Meanwhile, the Home Office stressed that nearly 60,000 foreign criminals and illegal migrants have been removed or deported from Britain in the last 19 months.
It released footage from a deportation flight as it seeks to convince the public that it is getting to grips with illegal immigration and discourage people without any genuine asylum claim from coming to the UK.
As the Government seeks to tighten Britain’s borders, a third African country has agreed to take back illegal immigrants after the Home Secretary threatened to block visas for its citizens.
Shabana Mahmood issued the threat to the Democratic Republic of Congo (DRC) at the end of December last year over a lack of cooperation on returning foreign offenders and those with no right to be in the UK.
At the same time, she halted preferential treatment for Congolese diplomats and VIPs and ended fast-track visa processing for the country’s citizens.
On Friday, the Home Office announced the DRC had now agreed to cooperate.
Ms Mahmood said: “My message is clear, if foreign governments refuse to accept the return of their citizens, then they will face consequences.”
The DRC is the third country to reach an agreement with the UK after being threatened with visa penalties.
Angola and Namibia both said they would take back their citizens in December, a month after Ms Mahmood identified them as possible targets for penalties.
