(CNN) Authorities in Massachusetts are warning of an electrical "outlet challenge" video on TikTok after three incidents sparked concern, including two in schools.

The video on the social media platform involves using part of a phone charger, a wall outlet and a penny to cause sparks, electrical system damage and possibly fire, said Massachusetts Fire Marshal Peter J. Ostroskey in a letter alerting fire departments and educators

In Plymouth North High School on Tuesday, firefighters found two scorched outlets and a cellphone charger with a penny fused to the prongs, Plymouth Fire Chief Edward Bradley said.

School Superintendent Gary Maestas said there were no injuries or significant damage.

"We are working with the Plymouth Police and Fire Departments to fully understand the scope of this issue and pursue charges to the fullest extent of the law," said Maestas in a statement posted to Twitter.

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