PALO ALTO, Calif. (AP) — Security was heavy at Stanford University as some of Silicon Valley's elite gathered for a private memorial for Apple co-founder Steve Jobs.

It was unclear when the event on Sunday started or how many were in attendance but reporters saw dozens of people walking from a church to another building. Soft music could be heard coming from there later.

Apple spokesman Todd Wilder told reporters he'd been there since 2 p.m. PDT. He said it was a private event and he couldn't release any details about it. Stanford also declined comment.

Earlier, guards directed the handful of reporters to a parking lot several hundred yards away from Stanford's Memorial Church where the service was held.

Additional personnel behind steel barricades allowed only a smattering of vehicles to enter the area.

Jobs was the mastermind behind popular gadgets such as the iPhone and iPad. He died Oct. 5 at age 56 after struggling for years with pancreatic cancer.