MORGAN HILL -- Police said that when residents of a Diana Avenue home opened their garage door around 11:30 a.m. Thursday, they discovered two things that weren't supposed to be there.

One was a gold Honda Odyssey minivan, parked inside and loaded with thousands of dollars' worth of their possessions. The other was 23-year-old Mohamed Omer, who they detained until police arrived to arrest him on suspicion of burglary.

Morgan Hill police said that investigators soon discovered that additional suspects were at a nearby restaurant, where they found 28-year-old Joseph Barrios and a 13-year-old, both from San Jose.

The residents told police that they had lost a garage door opener and a set of keys to their car in recent weeks, but did not report the loss because they hoped the items were simply misplaced and would turn up.

They turned up inside Omer's Odyssey. Police said it's not known how the suspects came to be in possession of the opener and keys.

The three were arrested, with Omer and Barrios being booked into Santa Clara County Jail and the young suspect into juvenile hall. All were charged with residential burglary.

Morgan Hill police said in a statement that had the loss been reported, "steps could have been taken to disable the garage door thus not allowing the suspects to use the remote opener."

Anyone with information about the burglary attempt, which happened on the 400 block of Diana Avenue, to contact them at 408-779-2101 or the anonymous tip line at 408-947-7867.

Contact Eric Kurhi at 408-920-5852. Follow him at Twitter.com/erickurhi.