Investigators are searching for more victims who may have been sexually assaulted by a former Charles County school aide.

At least seven boys were allegedly sexually assaulted by 30-year-old Carlos Bell, who was also a track coach, officials said.

RELATED: HIV positive ex-school aide accused of sexually assaulting boys, investigators say

According to the sheriff’s office, an investigation began in December after a high school student’s parent raised concerns about “electronic messages” from Bell to her child.

Bell, who was an instructional assistant at Benjamin Stoddert Middle School and also the head indoor track coach at La Plata High School, was immediately removed from the school and barred from coaching. Charles County Public Schools said Bell hasn’t worked in any school building since Dec. 22, 2016.

Detectives searched Bell’s work computer but did not find anything suspicious. However, when they searched his home computer they found data linking him to the production of child pornography.

According to investigators, Bell sexually abused several males on school property, his home and possibly at other locations.

Officials said Bell later admitted to being HIV positive and evidence was recovered to corroborate his statement. As of now, investigators are not aware that any victims have contracted HIV and they will be offering testing.

Bell is currently being held at the Charles County Detention Center with no bond.

Officials say additional charges are forthcoming.

Investigators believe that there could be additional victims. They are asking anyone whose child may have had contact with Bell to talk with their children about this matter.