A woman in her late 30s is dead after she was stabbed at an apartment building in northwest Toronto.

Emergency services were called to the scene at 5:30 a.m., on Sunday at the building on King Street near Weston Road. The woman, a resident of the building, was found with stab wounds and her vital signs were absent.

A man has been arrested, and police described the incident as a domestic situation. No charges have yet been laid.

"I don't know the exact extent of their relationship yet. I don't know if they were husband and wife or boyfriend and girlfriend," Det.-Sgt. Peter Trimble said Monday.

Police are looking for anyone who may have seen or heard anything to contact them.