Six Loudoun County middle school students were caught at school under the influence of alcohol Thursday, the county sheriff’s office said.

The students at J. Michael Lunsford Middle School in Chantilly were all between the ages of 12 and 14, according to a news release from the sheriff’s office. The students were found to have been drinking after one student came to the school’s clinic around 10 a.m. complaining of illness.

School officials and school resource officers from the county sheriff’s office suspect the students drank alcohol in the early morning hours before classes began.

Parents were notified, but none of the students involved needed medical attention.

The incident is under investigation, the sheriff’s office said.