Police say they continue to investigate the circumstances surrounding the sudden death of a 19-year-old woman in Halifax and it's still not known what led to her death.

Halifax Regional Police say there were called to a Dalhousie University residence, LeMarchant Place, at around 3:20 a.m. to help with a medical emergency.

They say the woman was pronounced dead at the scene.

Police say the medical examiner's office conducted an autopsy Friday but there will be further testing because it did not determine the cause of death.

University president Richard Florizone says the woman attended the school. He sent a message to the campus community encouraging students to contact counselling services.

"Our thoughts and condolences are with the family and friends of our student, and with the entire campus community at this difficult time," he said in an email.

Police say there is no evidence to suggest foul play. Officers with the forensic identification section were at the residence Friday morning but are no longer on site, police say.

Police have not released the woman's name.

The building, located at 1246 LeMarchant Street, has rooms for 300 students over five floors.

The lower levels house counselling and health services, an enrolment and recruitment centre and services for international and exchange students, according to the university's website.