Federal safety regulators are investigating a Roanoke school following the detection of lead in some paint chips.

Roanoke City Public Schools deputy superintendent Curt Baker tells media outlets that the amount of lead detected at Highland Park Elementary School doesn't indicate a health risk. Baker says he's confident the school is safe for students and employees.

The U.S. Occupational Safety and Health Administration began its investigation Wednesday.

Baker says workers discovered the paint chips in a drop ceiling in December while installing a new heating and air conditioning system.

Attorney Mark Williams says several teachers have complained of respiratory problems. Williams is advising one teacher.