MEDIA, Pa. (CBS) — Two female students at Penncrest High School are accused of giving a teen boy a water bottle mixed with urine and toilet water, Pennsylvania State Police say. Authorities say the 15-year-old boy became sick after drinking the contaminated water bottle.

Police say two 15-year-old girls are considered suspects in the case.

The alleged incident happened on May 7 and the male student came forward to police on May 11.

Sources say the teen boy developed an infection related to E. coli poisoning.

State police have characterized the investigation as an aggravated assault case. According to Pennsylvania law, aggravated assault is when an “action causes serious bodily injury to another and shows an extreme indifference to human life.”

State police are not commenting on any of the details as to the motivation behind this.

Sources claim the two girls involved were disciplined, but it’s unclear to what extent.

Some parents believe criminal charges are warranted.

“It’s very sad with what the youth is doing to other students,” said Anna Sgambato. “It is very sad, you can’t even trust drinking a bottle of water.”

The Rose Tree Media School District said it “does not comment on allegations, accurate or inaccurate, related to students or personnel, or to the accuracy or inaccuracy of statements made to the [Pennsylvania State Police].”

The school board president did not respond for comment.

There have been no charges filed.

CBS3’s Joe Holden contributed to this report.