GRAND RAPIDS, Mich. -

Two teenagers are being held in a juvenile detention center in the off-campus sexual assault and robbery of a West Michigan college student.

WOOD-TV reports that the 14-year-old and 16-year-old boys were arraigned Monday in Grand Rapids and ordered held without bond.

They were arrested Friday after police received tips about suspects in the Sept. 10th attack on a 21-year-old Grand Valley State University student as she walked home from a bus stop.

The victim told police two juvenile males approached her and tried to engage her in conversation several times.

They then physically and sexually assaulted her. One of victims roommates stopped the attack.