Demolition work on parts of a former electronics factory in Lanarkshire has been halted because of concern about the potential release of pollutants.
The factory opened in 1996 but closed five years later
The Scottish Environment Protection Agency is investigating activities at the former Chunghwa picture tubes plant on the Eurocentral site.
Contractors have been advised to stop work on sections of the buildings which may contain ozone-depleting substances.
SEPA said it wanted to ensure waste at the site was properly disposed of.
The agency believes certain roof panels and cladding could contain hydrochlorofluorocarbons (HCFCs), which are harmful to the ozone layer.
Crushing these panels in the open air could release HCFCs.
A SEPA spokeswoman said: "Until further information is provided by the company involved, SEPA has advised that the demolition of certain sections of the buildings stop."
"We have not asked for all work at the site to stop. The sections in question are Kingspan panels, which SEPA believes contain ozone depleting substances."
The spokeswoman added that their investigations will include the types of wastes being generated at the site, the destination of any wastes that had left the site, and any waste that remains on site.
SEPA said that panels containing HCFCs should be sent for specialist treatment.
The Chunghwa plant opened in 1996 and manufactured tubes for computer monitors and televisions.
The demolition work is part of a £330m redevelopment of the 670-acre Eurocentral site.
Construction company, Bower & Kirkland, is managing the work.
It said it was working closely with SEPA on the issue.