The UK Border Agency says it is working with Northampton Borough Council to deal with camps set up by homeless migrants in the town.
The latest encampment has been discovered on the site of the town's former power station.
It's thought up to three people could be living there. More at ITV Anglia.
More top news
A suspect lies spread-eagled on the floor with armed officers standing over him.
The road was closed and surrounding properties were evacuated.
The RSPCA is issuing warnings to pet owners after a cat died from antifreeze poisoning in Newcastle-under-Lyme.