CHESHIRE, Mass. — A police investigation led to the arrest on Thursday morning of an employee of the Adams-Cheshire Regional School District.

Supervisor of Special Services Kurt M. Garivaltis, 45, is being charged with possession of a Class B substance, Percocet. He is to be arraigned on Wednesday, Jan. 30, in Northern Berkshire District Court.

Superintendent Kristen Gordon confirmed on Friday that an employee was arrested after an ongoing investigation led authorities to do a car search in the school's parking lot and a search of the employee's office at about 7:45 a.m. on Thursday.

"At about 9 a.m., the authorities informed me they were going to make an arrest at that time and we put the school in a soft lockdown," said Gordon, who estimated the lockdown lasted about 11 minutes and was done to shield the children from seeing someone they knew in handcuffs.

She said at no time was anyone in any danger and the investigation had nothing to do with firearms or anything related to that.

"The authorities were extremely respectful of the fact this was an elementary school," she said, adding that the individual "is not working at the moment."

The arrest was made by the Berkshire State Police Detective Unit after executing a search warrant. According to a report filed in court by Trooper Daren W. Snyder, detectives discovered Percocet during the search "for which [Garivaltis] did not have a prescription."