ST. PAUL (AP) — St. Paul police suspect a 31-year-old man killed his wife and 18-year-old brother-in-law, but authorities still don't know how the husband died.

The Ramsey County medical examiner's office ruled that 27-year-old Pahnia Yang and her brother, Kong Meng Lee, died of injuries caused by a sharp object. But the cause of death of Yang's husband, Chue Lor, has not been determined.

Investigators suspect Lor killed his wife and brother-in-law in a domestic altercation. Police are not seeking any suspects in the deaths.

Police went to an apartment building Sunday afternoon after getting a 911 call. Officers found Yang and Lee fatally injured and also found Lor dead.

No other information is expected to be released until toxicology tests are completed.

More From AM 1240 WJON