Boston police on Friday released surveillance photos in their investigation of an attack on a Northeastern University student in Mission Hill early Thursday.

The student was walking home from work near 578 Huntington Ave. about 4:20 a.m. Thursday when a man grabbed her by the neck from behind and pulled her into an alley, police said.

The victim screamed, alerting a nearby residence hall security officer and causing the suspect to flee, according to police.