2 students injured in UIC College Prep chemical reaction

CHICAGO (WLS) -- Two students were injured after a small chemical reaction during lab at UIC College Prep, Chicago police said.

The students were taken to Stroger Hospital with burns to their faces. They are expected to be fine, according to police. A third student had a minor eye irritation, officials said.

The students were mixing chemicals in the chemistry lab to create a green flame when something went wrong and there was an explosion, police said. The same experiment has been done many times in the past without incident, according to the deputy chief of police.

The Chicago Health Department checked the classroom and determined it was safe, but the lab is closed for cleanup.