A man was arrested for entering a flat which has been shut down by police.
A closure order has been in place at a flat in Ellis House, Charrington Place, St Albans, since January 30.
Only the person living in the flat, as well as Hightown Housing Association and the emergency services are allowed in there.
There are notices on both the door and wall outside stating there is a closure order.
However, someone who had no permission to go inside the flat went inside.
At 4am on Saturday, a 40-year-old man was arrested for entering the premises in contravention of a closure order.
He has been bailed and is due to appear at St Albans Magistrates Court on March 9.
Sergeant Mike Saunders from the community safety unit said: "Entering a property which has a partial closure order is a serious offence.
"For the safety of nearby residents, I'd like to reassure the community we will continue to monitor this address and take further action if necessary."
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