Suffolk police say an adult man and woman boarded a school bus transporting students to Sachem North High School early Wednesday.

Authorities say the two boarded the vehicle in Holbrook at around 6:30 a.m.

A note sent to families by the Sachem Central School District says that due to the limited lighting and the fact that the pair were wearing winter clothing, it was not realized that the two individuals were not authorized to ride.

The two individuals exited the bus a short time later without incident. They did not interact with any other riders.

The incident is under investigation and believed to be non-criminal at this time.