ATLANTA (AP) — In response to students' concerns, Emory University says it will set up a task force to look at the feasibility of blocking a popular social media app called Yik Yak.

WABE-FM reports (http://bit.ly/1SRN8pz) that in October, a student at Emory's Oxford College campus was arrested after she posted a message on the app threatening to shoot everyone. Since then, students have called for the university to block the app. Black student leaders, in particular, say the app is a breeding ground for hate speech against students of color.

The app allows users to anonymously post a comment and anyone in nearby ZIP codes can see, share and rate the comments.

Some students want Yik Yak to set up a "geofence" around Emory ZIP codes.

Yik Yak declined to comment.