LOS ANGELES — A law enforcement official says the powerful sedative Diprivan was found in Michael Jackson's home.

Diprivan is an intravenous anesthetic drug widely used in operating rooms to induce unconsciousness. Also known as Propofol, it's very unusual to have in a private home.

The law enforcement official spoke on condition of anonymity because the person was not authorized to speak about the matter.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

LOS ANGELES (AP) — City officials are scrambling over the holiday weekend to try to figure out how to accommodate a public memorial service for Michael Jackson at a venue that can hold no more than 20,000 people.

The event has been set for 10 a.m. Tuesday at the downtown Staples Center, according to a statement from the Jackson family's publicist. Eleven thousand tickets will be distributed, the statement said. The service is expected to draw tens of thousands of spectators wanting to pay their respects to the King of Pop, who died June 25. How city officials will handle the massive crowd remains to be settled.

Randy Phillips, chief executive of AEG Live, which owns the Staples Center and was Jackson's promoter, said tickets would be free. He was not sure how they would be distributed.

Los Angeles City Councilman Dennis Zine said plans for the memorial are clearly moving forward, but he wished there had been more time to work out the logistics.