Four people were shot to death early Friday in a Kansas City house, and a woman who was in an upstairs room reported seeing a man running from the area, police said.

The victims were two men and two women believed to be in their 20s and 30s, said police spokesman Darin Snapp.

A woman in an upstairs apartment in the home said she heard several gunshots around 2 a.m. and saw a man wearing a black jacket run from the house, Snapp said.

He said the shooter appeared to have known the victims, but authorities had yet to determine a motive.