MIAMI — A man barged into a birthday party early Sunday, shot his estranged wife and three other people to death, then went home, set his truck and house on fire and killed himself, police said.
Witnesses described a chaotic scene that started when the man showed up uninvited at the party and told about a dozen people there that he blamed them for his wife leaving him, said homicide detective Ervens Ford.
Then he opened fire. Some took cover while others, including a pregnant woman, ran into the street.
"It was chaotic," Ford said. "I can't imagine what it was like in there."
The man also killed his 51-year-old wife's mother and daughter, along with her daughter's boyfriend, whose birthday they were celebrating, Ford said.
Police did not release the victims' names because other family members had not been notified. They said the man and his wife were married about four years and they weren't sure when she left him.
Officers got a call shortly after midnight that numerous shots had been fired and a red pickup truck had been spotted leaving the scene.
Juan Sosa, who lives a block away, was out walking his dog early Sunday when he heard two shots and saw people running toward him, screaming. Then he heard as many as two dozen more shots and ducked behind a large tree to call police.
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"I didn't want to get hit," he said.
The pregnant woman who fled was taken to the hospital as a precaution, but she was not hurt.
Soon after, someone called 911 to say a building about three miles away was on fire and more shots had been fired. That's where officials found the alleged gunman dead. Ford said he set fire to both his truck and the building he lived in before shooting himself.
Janseen Almodovar, who lives across the street, rushed outside when he heard people screaming and honking. He said the entire building and a truck out front were in flames.
"We thought the truck was going to blow up," Almodovar said.
Panicked neighbors weren't sure if anyone was inside the one-story ivory stucco building, but they couldn't knock because the fire was so intense.
Landlord Abel Loredo, who owns the building where the alleged gunman shot himself, said the man had lived there for five years and had always been on time with the rent for his one-bedroom, one-bathroom apartment.
Loredo declined to identify the man but said he had moved from Cuba about a decade ago and seemed very nice. The man was a cook at a restaurant in nearby Little Havana for a time before becoming an electrician a few years ago.
Neighbors said there had never been any problems with police and the man and his wife were often seen in their yard barbecuing. Loredo said the man's wife and her son had lived with him at some point, but he didn't know if they were still living there.
Sosa, who lives in the quiet neighborhood where the family gathering took place, said about 20 people ran into the street after the shots were fired. The last person he saw was a limping man who got into a red pickup truck and sped away without turning his lights on.
Sosa said he had seen the truck driving around the neighborhood earlier and that his father remembered seeing it several times in the last few weeks.
He did not know the people who were killed but said he felt badly for them.
"I feel sorry for the family," he said. "There's no excuse for that."
(This version CORRECTS spelling of detective's first name to Ervens.)
Calle Ocho (SW 8th St) in Little Havana, Miami, Florida just east of SW 27th Avenue where it starts one-way eastbound. 
Five people are dead following a murder-suicide in Miami, Florida today, after a man crashed a birthday party early Sunday morning. He informed the party-goers that they were responsible for his wife's decision to leave him, and then proceeded to open fire with a semi-automatic hand gun. The guests fled the scene into the street, or found cover.

The man, whom police identified as Guillermo Lopez, 48, immigrated to the United States from Cuba about 10 years ago. There were about a dozen people in attendance at the party. He killed his wife, who had left him, and shot her daughter, her daughter's boyfriend, and the boyfriend's grandmother. They were killed at approximately 12:15am in Little Havana, Miami.

Police first responded to the 2800 block of Southwest 38 Court following reports of gunfire. Four bodies were discovered behind the house.

"It was chaotic. I can't imagine what it was like in there," said homicide detective Ervens Ford.

Lopez fled the scene in a red Toyota Tacoma pickup truck to his home, which was about  from the original scene. He set both the house and truck on fire and committed suicide.

Police and firetrucks responded to a second 911 call regarding the blaze at the 700 block of Southwest 33 Avenue where the assailant's body was found with a gunshot wound.

The victims have been identified as Lazara Mendez, 50; Nayla Canfux, 19; Francisco Casas, 27; and Maria Lefran Christ, 77.