A Texas gunman who was being sought in connection with the fatal shooting of five people on Friday night after a neighbor asked him to stop firing his weapon remained at large and was considered to be armed and dangerous, the authorities said on Sunday.
The gunman, Francisco Oropesa, 38, refused a request by the neighbor to stop shooting because the noise was keeping his baby awake. Instead, the authorities said, Mr. Oropesa retrieved an AR-15 and opened fire at his neighbor’s home in Cleveland, Texas.
Mr. Oropesa, officials said, shot several members of the same family. Among the dead was an 8-year-old boy.
At a news conference on Sunday, the authorities said that more than 200 law enforcement officers were looking for Mr. Oropesa and that they had no leads regarding his whereabouts. They offered an $80,000 reward for his capture.
“We do not know where he is,” said James Smith, a special agent in charge for the F.B.I. in the Houston area. “We do not have any tips right now as to where he may be. Right now, we have zero leads.” Mr. Oropesa, he added, was considered to be “a threat to the community.”
Sheriff Greg Capers of San Jacinto County said that there were 10 people inside the house at the time of the shooting, five of whom remained alive.
He said that Mr. Oropesa had been drinking when the neighbor, Wilson Garcia, approached him to ask him to stop firing his gun. Sheriff Capers said that Mr. Oropesa responded: “I’ll do what I want to in my front yard.”
Sheriff Capers said that the authorities believed that they had recovered that AR-15, but that Mr. Oropesa could still be carrying another weapon. The authorities said they had found additional guns in his home, as well as an abandoned phone.
The F.B.I. identified those killed as Mr. Garcia’s wife, Sonia Guzman, 25; Diana Velazquez Alvarado, 21; Juliza Molina Rivera, 31; Jose Jonathan Casarez, 18; and Daniel Enrique Laso, 8.
Two of the women appear to have been killed while shielding the family’s children, Sheriff Capers said on Sunday. “My heart is with this 8-year-old little boy,” he said. “I don’t care if he was here legally. I don’t care if he was here illegally. He was in my county.”
Three other people were taken to hospitals after the shooting. The victims were all from Honduras, officials said.
The authorities had initially identified the man as Francisco Oropeza, but on Sunday afternoon, the F.B.I. said that his last name would be spelled with an “s” going forward “to better reflect his identity in law enforcement systems.”
An “incorrect” image of Mr. Oropesa had also been “mistakenly disseminated” the agency said on Twitter on Sunday. The F.B.I. said it had since removed the image from its social media accounts, and asked that others not share it.
According to the authorities, Mr. Oropesa had a history of shooting his rifle in his front yard, leading neighbors to call law enforcement on other occasions. They said that a ring doorbell had captured him approaching the neighbors’ front door with his weapon on Friday, and that they had interviewed his wife.
Court records show that Mr. Oropesa had been charged with misdemeanor drunken driving in Texas in 2009 and convicted. The sentence in that case was not immediately available.
Under Texas state law, a municipality cannot regulate the discharge of a shotgun, air rifle or pistol on a private land that is 10 acres or more, and is more than 150 feet from another property.
“If it’s in a smaller subdivision, something like what they’re living in, yes it could very easily be construed to be illegal,” Sheriff Capers said on Sunday. “It just kind of depends on where the weapon is pointed.”
Rene Arevalo, who lives in the neighborhood where the shooting took place, said that people in the community often shoot for sport, and that it was not unusual to hear gunshots, but that he had never witnessed any arguments involving weapons.
Mr. Arevalo, who lives with his wife and 21-year-old son, said that he had considered building a fence around his home. Now, he added, it was a necessity. “It’s just concerning,” Mr. Arevalo said, “not knowing who your neighbor is.”
Eliza Fawcett and April Rubin contributed reporting and Kirsten Noyes and Jack Begg contributed research.