MIAMI BEACH (CBSMiami) – An argument between a couple turned deadly at a Miami Beach apartment early Sunday.

As the fight between the man and woman escalated at 7635 Abbott Avenue, police spokesman Sgt. Bobby Hernandez said the man grabbed a knife and stabbed the woman. When officers arrived they found her at the bottom of a staircase outside the apartment building. She died before paramedics could get her to a hospital.

Hernandez said the man attempted to commit suicide but was unsuccessful. He was taken into custody.

Police have not released the couple’s names nor have they said if they were married or dating.