AP Photo

A California driver's license bearing the name of Jenni Rivera sits on the ground at the site where a plane allegedly carrying Rivera crashed near Iturbide, Mexico Sunday Dec. 9, 2012. The wreckage of a the small plane believed to be carrying Jenni Rivera, the U.S-born singer whose soulful voice and unfettered discussion of a series of personal travails made her a Mexican-American superstar, was found in northern Mexico on Sunday. Authorities said there were no survivors. (AP Photo) (December 10, 2012)

MONTERREY, Mexico (AP) — U.S. authorities confirmed Monday that Jenni Rivera, a U.S.-born singer whose soulful voice and openness about her personal troubles made her a Mexican-American superstar, was killed in a plane crash in northern Mexico.

The National Transportation Safety Board said it was sending a team to help investigate the crash, and the board was told by Mexican authorities that Rivera had died in Sunday's crash.

Rivera's relatives in the U.S. already had few doubts that she was on the Learjet 25 that disintegrated on impact Sunday in rugged territory near the town of Iturbide in the Sierra Madre Oriental in Nuevo Leon state.

"My son Lupillo told me that effectively it was Jenni's plane that crashed and that everyone on board died," her father, Pedro Rivera, told dozens of reporters gathered in front of his Los Angeles-area home. "I believe my daughter's body is unrecognizable."

He said that his son would fly to Monterrey Monday or Tuesday.

Alejandro Argudin, of Mexico's civil aviation agency, said Monday it would take at least 10 days to have a preliminary report on what happened to the plane.

"We're in the process of picking up the fragments and we have to find all the parts," Argudin told reporters. "Depending on weather conditions it would take us at least 10 days to have a first report and many more days to have a report by experts."

The Learjet 25, number N345MC, took off from Monterrey at 3:30 a.m. local time en route to Toluca, outside Mexico City, and was reported missing about 10 minutes later. It was registered to Starwood Management of Las Vegas, Nevada, according to FAA records. It was built in 1969 and had a current registration through 2015.

According to the National Transportation Safety Board, the twin-turbojet was substantially damaged in a 2005 landing mishap at Amarillo International Airport in Texas. It hit a runway distance marker after losing directional control. There were four aboard but no injuries. It was registered to a company in Houston, Texas, as the time.

Messages of condolence poured in to the Rivera family from musicians and celebrities.

Mexican songstress and actress Lucero wrote on her Twitter account: "What terrible news! Rest in peace ... My deepest condolences for her family and friends." Rivera's colleague on the Mexican show "The Voice of Mexico," pop star Paulina Rubio, said on her Twitter account: "My friend! Why? There is no consolation. God, please help me!"

Born in Los Angeles, California, Rivera was at the peak of her career as perhaps the most successful female singer in grupero, a male-dominated regional style influenced by the norteno, banda and ranchero styles.

A 43-year-old mother of five children and grandmother of two, the woman known as the "Diva de la Banda" was known for frank talk about her struggles to give a good life to her children despite a series of setbacks.

She was recently divorced from her third husband, was once detained at a Mexico City airport with tens of thousands of dollars in cash, and she publicly apologized after her brother assaulted a drunken fan who verbally attacked her in 2011.

Her openness about her personal troubles endeared her to millions in the U.S. and Mexico.

"I am the same as the public, as my fans," she told The Associated Press in an interview last March.

Rivera sold 15 million records, and recently won two Billboard Mexican Music Awards: Female Artist of the Year and Banda Album of the Year for "Joyas Prestadas: Banda." She was nominated for Latin Grammys in 2002, 2008 and 2011.

Transportation and Communications Minister Gerardo Ruiz Esparza said the impact of the crash was so powerful that the remains of the plane "are scattered over an area of 250 to 300 meters."

"There is nothing recognizable, neither material nor human" in the wreckage, he said.

A mangled California driver's license with Rivera's name and picture was found in the crash site debris.