Emergency environment services are at the scene of a diesel leak in the St. Lawrence River.

About 7,500 litres of the fuel leaked out of the Louis-Jolliet day-cruise ship near the Port of Quebec, in Quebec City.

Ship owner Croisières AML said it noticed the leak around 7 a.m. Sunday. By early afternoon, the Coast Guard said the spill had been mostly contained by floating booms.

However, Michel Plamondon of the Coast Guard said strong winds and current have so far transported the diesel into the nearby Île d'Orléans region.

"It's too early to talk about the impact," he told Radio-Canada. "As you know, there are times when there is a volume [of oil] that leaks and we may have the impression that it's a lot more than it is in reality."