The death toll in a mass shooting at a ballroom dance studio in California has risen to 11 people, after health officials said that one of the people wounded in the shooting had died. According to friends and colleagues, the beloved manager of the dance hall was among the 11 victims of Saturday’s gun massacre, which took place during a lunar new year celebration in Monterey Park, a majority Asian American community in the Los Angeles area. Ming Wei Ma, known to instructors as “Mr Ma”, died when a 72-year-old gunman entered the Star Ballroom and opened fire. A friend told CBS News that Ma “was the first to rush to try to stop the shooter”. The Los Angeles county coroner’s office – whose jurisdiction includes Monterey Park – had not yet confirmed Ma among the dead on Monday morning, when the agency named two women, My Nhan, 65, and Lilan Li, 63, as the only victims to be publicly identified so far. But the report of Ma’s death was corroborated by Dariusz Michalski, a professional ballroom dancing instructor at the Star Ballroom, who posted to Facebook a photograph of the two together with a heartfelt tribute to a man he called his “friend”. “Mr Ma, your love, joy for people will never be forgotten,” he wrote. “Your dance and signing passion will never disappear. We will never forget your shout in the studio: ‘I love you.’ You will be greatly missed. I love you my friend.” Authorities have still not confirmed a motive for the shooting, which also left at least nine other people injured, but law enforcement sources told local news outlets they believed the shooter had frequented the two dance studios he had targeted, making it possible that the shootings were motivated by some kind of personal dispute, including intimate partner violence. Investigators currently believe that the shooter intentionally targeted some victims, while others were killed at random, a law enforcement official told the New York Times. Authorities said that minutes after opening fire at the Star Ballroom, the shooter appeared at a second dance studio in nearby Alhambra, where he was disarmed by a worker now hailed for saving lives. The next morning, the gunman, an Asian man named as Huu Can Tran, was found dead in a van in the city of Torrance from a self-inflicted gunshot wound. Henry Lo, the mayor of Monterey Park, once described as the first suburban Chinatown, told CNN on Monday that the shooter was “a frequent attendee of the dance hall”. Several people who knew the shooter, including his ex-wife, told media outlets that he had a “hot temper”, and was sensitive about how he was perceived. The police department in the California town where he lived said he had repeatedly visited a police station in early January to complain that his family had tried to poison him. Tran’s ex-wife said she had met him while dancing at the Star Ballroom two decades ago, and that he had offered her dance lessons, CNN reported. The news outlet said it was not naming his ex-wife because of the sensitivity of the incident, and that the couple had divorced in 2005. His ex-wife said he was never violent towards her, but that he “would get upset if she missed a step dancing because he felt it made him look bad”, CNN reported. A longtime tenant of Tran’s in Los Angeles described him as an aggressive and suspicious person who had few friends, and said that ballroom dancing was his only social activity. The tenant told Reuters that Tran complained that people at the Star Ballroom studio were talking behind his back. “He was a good dancer in my opinion,” the tenant said. “But he was distrustful of the people at the studio, angry and distrustful. I think he just had enough.” Authorities were still investigating how the shooter obtained the weapons he used, including one that the Los Angeles county sheriff said appeared to be illegal in California, as well as investigating any warning signs or changes in his behavior in the weeks prior to the shooting. In early January this year, the shooter made two visits to the lobby of the police department in Hemet, California, where he lived, “alleging past fraud, theft, and poisoning allegations involving his family in the Los Angeles area 10 to 20 years ago”, the department said in a statement. “Tran stated he would return to the station with documentation regarding his allegations but never returned,” the department said. The Los Angeles county sheriff’s department had searched the shooter’s Hemet residence, local police said. Public and business records showed that the 72-year-old had run a trucking company with an address in Monterey Park, and that he had lived in the Los Angeles area since at least the 1990s. His ex-wife told CNN that he had emigrated to the US from China. The ballroom dance studios that were targeted, one in Monterey Park and a second in nearly Alhambra, were praised as vibrant social centers, whose patrons included many middle-aged and elderly couples who loved to dance. Relatives of My Nhan, one of the women killed at Star Ballroom, said on social media that they were “broken” by her death. “It’s still sinking in what happened to Mymy,” the family said in a statement posted to Twitter by Dallas-based WFAA reporter Tiffany Liou, who said the tragedy had struck “close to home” and that her husband’s family was “hurting beyond measure”. Liou said Nhan was the first of the victims shot and killed. The statement continued: “She spent so many years going to the studio in Monterey Park on weekends. It’s what she loved to do. But unfairly, Saturday was her last dance. “If you knew her, you knew her warm smile and kindness was contagious. She was a loving aunt, sister, daughter and friend. Mymy was our biggest cheerleader.” The statement, signed by “the Nhan and Quan family”, concludes with an expression of gratitude for people’s thoughts and prayers, and the support of neighbors and community. Officials have yet to publicly identify the eight other victims pending notification to their relatives, the coroner’s office said, while advising they were two women in their 60s, one woman in her 50s, two men in their 60s, and three men in their 70s. Authorities did not disclose an age for the 11th fatality, which was announced by the LA county department of health services. The department said that three additional victims from the shooting were still being treated at the LAC+USC Medical Center. “One remains in serious condition. The other two are recovering,” the department said. Others who attended lessons at the Star Ballroom painted a picture of a friendly, community-based facility that acted as a de facto social club for locals and dance enthusiasts. The shooting took place during what should have been a “joyous” event celebrating lunar new year, according to Elizabeth Yang, a Monterey Park lawyer who took classes there. “The whole city of Monterey Park went from celebrating to everyone being fearful and scared,” Yang told the South California Press-Enterprise. “We are devastated.” Yang said the “elegant” dance hall’s owners and instructors engaged well with students, who kept in touch with each other outside classes through online messaging applications and social gatherings such as Saturday’s celebration. The Monterey Park killings were among 36 mass shooting in the US so far this year, according to the Gun Violence Archive. The archive classifies shooting in which at least four people are wounded or killed – not counting any attackers – as mass shootings. There were three other mass shootings that injured at least four people during a single twelve-hour period this past weekend, according to the Gun Violence Archive: two in Louisiana, and one in Mississippi. At 72, Tran was the second-oldest mass killer in the US over the last nearly 20 years, According to a database compiled by the Associated Press, USA Today and Northeastern University. In 2011, a 73-year-old murdered five people in Yuma County Arizona before killing himself. The Violence Project, which tracks a subset of public mass-casualty shootings in the United States, identified another shooter in his 70s, a retired miner who killed five people in a store in Kentucky in 1981, in an incident motivated by a personal dispute. The median age of mass shooters in the Violence Project’s database is 32. Almost all of them were men. Ramon Antonio Vargas, Reuters, and the Associated Press contributed reporting