The veteran musician had been in Perth, Australia preparing to kick off the Rolling Stones' tour Down Under when he learned his fashion designer girlfriend had committed suicide by hanging herself in her New York apartment on Monday (17Mar14).
The band has subsequently postponed dates in Australia and New Zealand to allow Jagger time to mourn, and, on Thursday (20Mar14), he arrived in Los Angeles.
A statement released by the star's representative reads: "Mick Jagger has arrived in Los Angeles in order to be with members of his family. He will join his daughter Karis, an L.A. resident, and daughters Elizabeth & Georgia May, who are also with him for support.
"Later today Jade Jagger and son James will also join him whilst he makes arrangements for L'Wren Scott's funeral.
"Privacy for him and his family during this very difficult time is requested."
Jagger, who is expected to head to the Big Apple in the coming days to help Scott's relatives with memorial plans, broke his silence about the designer's shock death on Tuesday (18Mar14), when he posted a message online, in which he wrote, "I am still struggling to understand how my lover and best friend could end her life in this tragic way. We spent many wonderful years together and had made a great life for ourselves."
The couple had been dating since 2001 and had reportedly just purchased a luxury home together in New York.