Douglas council says it's investigating after someone dumped asbestos at the Civic Amenity Site yesterday.
The hazardous building waste meant the site had to be closed to the public while staff safely disposed of it.
Workers are now reviewing CCTV footage to find out where the material came from.
The local authority says anyone who drops off hazardous waste will be automatically banned and reported.
Cider microbrewery planned for Ballasalla
Covid wrongful arrest and torture claims thrown out by court
Tree fellers to close part of TT course on Thursday
Manx Utilities wants contractors for HQ refurb
Business needed for Peel coffee shop's 'new chapter'
Regulator freezes gas prices
Billionaire says Island's his favourite place on earth
Planners aren't influenced by advertising, says Cannan