LOS ANGELES, Jan 26 — Los Angeles-area investigators have found no connection between the victims of a mass shooting at a Monterey Park, California, dance hall and the elderly man who carried out the massacre last weekend, authorities said.

The 72-year-old assailant, Huu Can Tran, on Saturday killed 11 people and wounded nine others at the Star Ballroom Dance Studio, a venue just east of Los Angeles that is popular with older patrons of Asian descent. The attack took place during the two-day Lunar New Year celebration, one of the most festive events on the calendar for many Asians.