When police arrived shortly after 7 p.m. at a home on 133rd Place and Southwest 58th Terrace, they found a gruesome scene. The son was in the street stabbed to death and the mother dead in the doorway.
Both had foot-long gashes in their chests, police said. The victims were pronounced dead at the scene.
The attacker survived his suicide attempt and was taken to Jackson Memorial Hospital, where he remains in critical condition.
The woman's teenage daughter was also attacked and is in stable condition at Miami children's hospital.
Police, who were called about a domestic disturbance between a man and a woman, are investigating the relationship between the attacker and his victims.
"All we saw was the two dead bodies and the gashes on their chest with incisions more than a foot," witness Eric Kahlan told Channel 7 News. "It looked like it was done with a knife or something."
Veteran homicide detectives were taken aback by the gory scene. "Clearly its a graphic scene," said Miami-Dade Police Detective Roy Rutland.
The attacker and his victims have not yet been identified.
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