Story highlights All of the 19 students and 3 supervisors in one group are now accounted for

The search continues for possible other victims, Interior Ministry says

There was a high risk of an avalanche along the closed slope where the avalanche occurred

(CNN) Scores of rescuers worked into the night Wednesday looking for victims of an avalanche in the French Alps that killed two teenagers and a Ukrainian skier after engulfing them on a closed slope, officials said.

Ten students from the St.-Exupery school in Lyon, accompanied by their teacher, as well as the Ukrainian skier, were in the Les Deux Alpes ski resort when the avalanche occurred late Wednesday afternoon, the regional Isère government said in a statement.

Two students and the Ukrainian died in its aftermath, the statement said, while the students' teacher was taken to CHU hospital in Grenoble.

The French Interior Ministry said that all of the other children from the high school group had been found. It said that officials are still searching for other possible victims.

Some 80 people were part of the rescue effort, including military personnel, police and dog search-and-rescue teams, according to the Interior Minister. There were helicopters -- some to ferry out the dead and injured, and others to aid in the search effort, including one equipped with a thermal camera, officials said.

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