Teams from the ministry were on hand Wednesday night investigating the third wave of deaths that killed about 1,000 fish earlier this week when they discovered the latest batch of dead fish.

Samples are being sent to a lab for analysis.
'We need answers, and quick'

"We need answers, and quick ... because four times in a month, it's too much," said Sylvain Lamoureux, deputy director of the local ferry service Traversier Bourbonnais.

Over the past week, he and his employees have collected about 150 dead fish, including a dozen different species, around the Gatineau side of the ferry's property.

"After a month, [tests] need to be done urgently," he said. "People are swimming in this. It's not acceptable."