Police say a North Texas man has been charged in the fatal stabbing of his girlfriend and the wounding of her 16-year-old son.

Lewisville police say 24-year-old Nelson Flores was being held Friday on $2 million bond. He's charged with murder and attempted murder in the attacks Thursday night at an apartment. Police have not released a possible motive.

Officers responded to a 911 call from a bystander about a man and a woman fighting. Officers located 39-year-old Norma Gomez and her son at the scene. Both were transported to a hospital. She later died.

Police say Flores was also hurt and he was captured while seeking medical attention. Investigators are trying to determine whether Flores caused his own injuries.

Further details on the teenager weren't released.