ALBANY — Six Albany teens were hospitalized Tuesday after eating what appeared to be drug-infused brownies.

The eighth graders at Edmund O'Neal Middle School were transported by ambulance to Albany Medical Center as a precautionary measure after showing signs of nausea — including vomiting — and disorientation, school officials said.

The students were treated and released.

"We take this matter very seriously," O'Neal Principal David Bernsley wrote in a letter sent home to parents. He urged parents to discuss the risks of using, possessing or distributing illegal drugs with their children.

Albany City School District's medical director, Laura Staff, and nursing staff from around the district visited the school Tuesday afternoon to talk with students about the potential health risks associated with illegal drugs.

Student support services staff will be at school Wednesday to hold additional conversations.

School officials say they have identified the student who brought the adulterated snacks into school; that student was among the teens who were hospitalized. Administrators confiscated pieces of the substance found in his book bag.

Code of conduct procedures will be followed for all of the students, Bernsley said.

The matter is under investigation. School officials have not identified the drugs consumed by the teens, but say they have determined that the substance did not pose a life-threatening risk.