JOHNSTON, Iowa (KCRG-TV9) -- Police in Johnston, Iowa have arrested four high school students for sexually assaulting a 15 year old boy.
18-year-old Morgan Hough and 17-year-old Ritter Hayden each face charges of sexual abuse, robbery, and assault. Police say two 15 year olds face identical charges.
The incident reportedly happened on September 8th at Hough's home in Johnston. That's a suburb of Des Moines.
Police learned about the incident on the 18th after the school got an anonymous tip.
"We went out to the school talked to the student as well as the students parents and found out that there was merit to these allegations. It's very unusual, I can't say I've worked another case like this," said Lt. Tyler Tompkins of the Johnston Police Department.
Johnston High School released a statement saying, "We will and are doing all we can to maintain a safe and orderly environment for all students."