Officers arrived at the scene minutes later and saw multiple people wounded in various locations around a home, she said.
A family party was taking place and an uninvited guest was asked to leave the home. That person is believed to have started shooting, which prompted return fire from others, Cantu said.
The Houston Fire Department responded and at least one person was confirmed dead. Multiple people were in critical condition and in surgery, according to Cantu, who said some victims transported themselves to area hospitals.
Police detained multiple people but were not immediately certain if they had the shooting suspect in custody as the investigation continued Sunday morning, Cantu said.