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LOS ANGELES (AP) — Federal investigators who examined the burned-out wreckage of a scuba diving boat have not been able to determine what ignited a fire that killed 34 people off the California coast, a law enforcement official said Friday.Teams from the FBI and Bureau of Alcohol, Tobacco, Firearms and Explosives left after spending two weeks reviewing what remains of the Conception, according to an official with knowledge of the investigation.Parts of the vessel have been sent to labs for additional testing, said the official, who was not authorized to release the information publicly and spoke on the condition of anonymity. There is no indication anyone intentionally set the Sept. 2 fire.Six crew members were asleep when the fire broke out before dawn and trapped those sleeping in bunks below deck. Coast Guard rules require a roving watchman, and authorities were looking into possible criminal charges that would likely focus on an obscure federal law known as the seaman's manslaughter statute.RELATED: San Diego woman killed in deadly Conception boat fire off Santa BarbaraWith the boat propped up by braces and scaffolding, investigators wearing protective suits walked over planks to inspect and document the burned vessel at Port Hueneme, a naval base more than 60 miles (97 kilometers) northwest of Los Angeles, the official said. Some parts of the boat washed away because it was submerged for two weeks off Santa Cruz Island.Authorities also will examine hundreds of documents seized from the boat's owner, Truth Aquatics Inc., days after the fire.The Coast Guard, FBI and U.S. attorney's office in Los Angeles are leading a criminal investigation into the blaze, and the National Transportation Safety Board is conducting a safety inquiry.The captain and four crew members asleep on the vessel's upper deck survived the fire. The sixth, a 26-year-old deckhand named Allie Kurtz, was sleeping below deck and perished with the boat's 33 passengers.Truth Aquatics preemptively filed a federal lawsuit under a pre-Civil War maritime law that shields boat owners from monetary damages in a disaster at sea.Ryan Sims, a cook on the boat who broke his leg trying to escape the flames, claimed in a separate lawsuit that the boat was unseaworthy and operated in an unsafe manner.Coast Guard records show the Conception passed its two most recent inspections with no safety violations. 2408

LOS ANGELES (AP) — Deputies arrested a 13-year-old boy and seized a semi-automatic rifle after he threatened to shoot other students and staff at a Los Angeles-area middle school, authorities said Friday.In a separate case, a boy at another school was taken into custody involving a planned shooting.The arrests came barely a week after deputies were frantically summoned to a high school in Santa Clarita, where a 16-year-old boy killed two fellow students and took his own life.Since then, the Los Angeles County Sheriff’s Department has investigated at least 30 school threats, spokesman Sgt. Bob Boese said.RELATED: Santa Clarita high school shooting: 2 killed, 3 hurt; suspected shooter in 'grave' conditionThe incidents that resulted in the arrests were the only ones deemed credible.At Animo Mae Jemison Charter Middle School in Willowbrook, just south of downtown Los Angeles, multiple students overheard the 13-year-old say Thursday that he would carry out the shooting on campus the following day, Sheriff Alex Villanueva said.The students alerted teachers and police were notified.Deputies searched the boy’s home and discovered an AR-15-style rifle, 100 rounds of ammunition, a list of names and a drawing of the school, Villanueva said.The boy was arrested without incident on suspicion of making criminal threats. An adult male relative also was arrested and could face weapons charges, Boese said.RELATED: Teen used ‘ghost gun’ in California high school shootingInvestigators were trying to determine who owns the gun that authorities initially called a ghost gun — a weapon without a serial number made from parts from other guns. Villanueva later clarified the weapon has a serial number.Villanueva praised school officials for quickly notifying authorities about the threat.“The fact that people stepped forward and said what they had heard led us to prevent a tragedy today,” he said.The other boy was arrested Thursday in Palmdale, north of Los Angeles. Villanueva said the student at Knight High School made threats on social media following a campus fight.The sheriff said the boy acknowledged posting threats along with pictures of a teen with a gun. No weapon was recovered in the case.RELATED: Trauma Surgeons call for urgent intervention after school shootingThe sheriff’s department still hasn’t determined a motive for the deadly Nov. 14 shooting at Saugus High School in Santa Clarita.Villanueva said the . semi-automatic pistol used by gunman Nathaniel Berhow was assembled from gun parts and did not have a serial number. Police have not determined where and when Berhow got the gun.___Associated Press reporters Brian Melley and Michael R. Blood in Los Angeles contributed to this report. 2728

LOS ANGELES (AP) — Helen Reddy, the Australian-born singer who scored an enduring hit with her feminist anthem “I Am Woman,” has died at 78 in Los Angeles.Reddy’s children announced their mother’s death Tuesday evening, saying that while they are heartbroken, they “take comfort in the knowledge that her voice will live on forever.”The Australian-born singer enjoyed a prolific career, appearing in “Airport 1975” as a singing nun and scoring several hits, starting with “I Don’t Know How To Love Him" from “Jesus Christ Superstar” in 1971.She won the best female pop vocal performance in 1973, thanking her then husband and God, telling the audience “because she makes everything possible.” 700

LOS ANGELES (AP) — Earthquake early warning alerts will become publicly available throughout California this week, the Governor's Office of Emergency Services said Wednesday.The system's statewide debut Thursday will coincide with the 30th anniversary of the Loma Prieta earthquake that ravaged the San Francisco Bay area on Oct. 17, 1989, as well as the annual Great Shakeout safety drill.The warnings produced by the ShakeAlert system will be pushed through a smartphone app called MyShake and the same wireless notification system that issues Amber Alerts.The state earthquake app, developed at the University of California, Berkeley, is available for download to IOS users through iTunes and through GooglePlay stores for Android phones.The system does not predict earthquakes. Rather, it detects the start of an earthquake and calculates location, intensity and sends alerts to areas where shaking is likely to occur from quakes of magnitude 4.5 or greater.The alerts have been in development for years and last year were made broadly available to businesses, utilities, schools and other entities.Large-scale public notification has been available for Los Angeles County since the start of the year through an app developed for the city of Los Angeles, but it hasn't been triggered yet. 1300

LOS ANGELES (AP) — One of the deadliest accidents in recent U.S. maritime history was the fault of the owners of a dive boat whose lack of oversight resulted in a fire that swept through the vessel and killed all 34 people in their bunks below deck. The National Transportation Safety Board says Tuesday the Conception's captain failed to post a roving night watchman aboard the Southern California scuba dive vessel, which allowed the fire to quickly spread and trap the 33 passengers and one crew member. The NTSB also faulted the Coast Guard's inadequate regulations. Attorneys for the boat's owner and the captain did not immediately respond to requests for comment. 678