Washington (CNN) -- A Washington elementary school student who allegedly brought cocaine to school and shared it with other children has been charged with possession of a controlled substance, the school system said Friday.
Four children who received cocaine ingested it orally or inhaled it, said a spokesman for District of Columbia Public Schools.
The students were evaluated by a school nurse and taken to the hospital to be checked out, along with a fifth child who did not ingest any of the cocaine. All of the students are reported to be OK.
The incident took place Thursday at Thomson Elementary School.
Fred Lewis, a spokesman for the school system, said a child brought to school "an undetermined amount of cocaine" and shared it with others in his class. Neither the school system or the police would release the names or ages of the children involved. Thomson has students from pre-kindergarten through fifth grade.
Local law enforcement and school officials could not immediately recall an instance involving cocaine use by such young students.
Thomson Elementary's principal, Albert DuPont, sent a letter home to parents asking them to speak with their children about the dangers of drugs. His letter included a request for parents to warn their kids "not to eat something from another child."
The school's students had a day off Friday because of a previously scheduled professional development day for teachers.
Counselors are going to be at the school Monday to discuss what happened with students and teachers and will stress the danger of drugs, the school system said.
Washington's Metropolitan Police Department would not comment on whether investigators have learned how the child obtained the cocaine. "The investigation is continuing," said police spokeswoman Gwendolyn Crump.