A section of Chester's historic walls have fallen down after excavations being carried out by a private developer.
Cheshire West Council said that the wall collapsed last night near the wall walkway to Grosvenor Shopping Centre.
A statement on the council's website said that investigations are on-going to establish the reasons for the collapse but "early indications appear to show that earth had been removed from the bottom of the city walls".
Councillor Karen Shore said: "The Council is taking this situation very seriously and we will ensure that a thorough investigation is carried out.
"I am thankful that no-one has been hurt as a result of this collapse and our priority will continue to be public safety."
The council have said that the developer has now stopped work at the site.