CAMBRIDGE, Mass. -- Jurors in the murder trial of a Harvard graduate student on Thursday listened to a voice mail message in which he described being attacked by a group of people and stabbing one of them.

Pring-Wilson left a message for Jennifer Hansen, a former girlfriend he had been out with that night. In the message, Pring-Wilson tells Hansen he was attacked as he walked home from the bar they had just left.

"I just got attacked by a group. I fended them off. I stabbed him a couple of times and um, don't repeat this to the police," Pring-Wilson is heard to say on the tape.

Boston.com -- Jurors hear voicemail message in Harvard student stabbing trial