Two Roxbury Township High School students have been charged with making threats after posting a photo of a gun on Snapchat with the message "I just can't wait to get back from Spring Break."

The students, ages 16 and 17, face charges including terroristic threats, causing false public alarm and cyber harassment. Their names were not released because they are juveniles.

Roxbury's high school had an increased police presence Wednesday after the threat was discovered on Tuesday, which was the final day of spring break for students, authorities said.

The Roxbury Township Police Department was notified just before 2 p.m. Tuesday. After an investigation, authorities were able to identify and arrest the two teens, police said.

Roxbury High School officials notified the public through an alert on the school's homepage.

"Please be assured that the situation is under control, and the student will not be on school property. The safety of our students and staff remains our first priority. You are being notified because there will be increased police presence in our schools," school officials said.

The teens were taken to the Morris County Juvenile Detention Center.

Alexis Johnson may be reached at ajohnson@njadvancemedia.com. Follow her on Twitter @alexisjreports. Find her on Facebook.