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BREAKING: At least 1 child killed in avalanche that struck French Alps on Wednesday

At least one child was killed in an avalanche that struck the French Alps on Wednesday afternoon.

French officials confirmed one fatality and three injuries as of 6:20 p.m. local time, according to the Associated Press. A group of 10 schoolchildren and one teacher was in the Deux Alpes region.

Five people have been found, including the teacher who was unconscious. Four students were found in cardiac arrest.

A Ukrainian man who was not a member of the group was also killed, according to the Agence France-Presse.

Deadly avalanche sweeps through ski location in the French Alps

Search and rescue efforts are ongoing. Periods of light snow are expected to continue through Thursday night as officials scour the area.

After days of heavy snow, a warning was issued for the area. The avalanche struck on a closed slope.

"Before the current snowfall, much of eastern France had been experiencing temperatures slightly higher than normal for January," AccuWeather Meteorologist Courtney Spamer said.

Significant changes in air temperature will alter the temperature gradient of the snowpack, leading to unstable conditions.

"...when temperature changes more than about 1 degree centigrade per 10 cm, the snow metamorphoses into weak, sugary, faceted crystals, which cause the lion's share of avalanche accidents," according to the National Avalanche Center.