LE ROY, NY — Environmental activist Erin Brockovich is investigating a mystery Tourette’s-like illness, which has struck at least 15 students at one upstate high school, causing distressing verbal outbursts and involuntary twitches.

Neurologists claim the Le Roy HS students are suffering from mass psychogenic illness — a psychological disorder that has spread through the student population unconsciously.

But Brockovich told The Democrat and Chronicle newspaper she believes more research needs to be done on environmental factors that may have caused the condition, which first surfaced in November.

Environmentalists want to look into whether five natural-gas wells near the school, which recently underwent a fracturing procedure, may have triggered the illness.