The Department of Environment, Food and Agriculture is asking people not to dump oil down drains after an incident in Douglas.
A number of ducks were contaminated with oil after someone poured it into drains that emptied into a local pond.
The department says it's investigating but can't say if it was an isolated incident or because of long-term improper disposal.
DEFA Minister Clare Barber is urging people to dispose of oil properly and says businesses should ensure waste oil is safely collected and stored.
Postal vote applications have to be in soon
Mum launches petition over university support
Bus services north and south face disruption later
Wildlife Trust unveils woodland plans
Deadline looms for by-election nominations
Biker in UK hospital after Mountain crash
Trial event closes roads in Peel and Ramsey
Requisition meeting for Garff voters