A diesel spill in Christchurch's Heathcote River could result in prosecution and a fine of up to $200,000.
Thousands of litres of fuel leaked into the river from a drain in Sockburn on Friday.
Environment Canterbury spokesperson Mike Freeman says if there is evidence to suggest the spill was deliberate, then it is highly likely legal action will follow.
Hundreds of volunteers are continuing to help with the clean-up.
Council staff were alerted to the problem when residents complained of a heavy smell.
Hundreds of ducks and other birds have been affected by the spill, which is not thought to be deliberate.
- Newstalk ZB
Diesel spill could bring prosecution
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