Residents of an upscale Montgomery County neighborhood were robbed in their home late Saturday night, county police said.

The residents were awakened about 11:30 p.m. in their home in the 7100 block of Natelli Woods Lane and found intruders inside, the police said.

According to police, the residents were confronted by the intruders, who demanded valuables. The robbers took property and left, leading to a search on the street of large, well-spaced homes on heavily wooded lots.

No one was found. In a statement issued Sunday, the intruders were described only as male. No ages were given.

Police said it appeared that they had entered through an unlocked door. Police said they were trying to determine whether the incident was related to other nighttime burglaries but gave no details.

A woman who lives on the street, which is north of the Capital Beltway and about half a mile from MacArthur Boulevard, called the incident unusual. She said the neighborhood’s reputation for safety influenced her decision to move there.

A daytime burglary that occurred June 22 and was described by police last week also appeared unusual, in regard to the items taken from a house on Holly Leaf Lane in Potomac.

The items, police said, included two basketballs. One was signed by the 2005 San Antonio Spurs NBA championship team, and the other by the 2007 Spurs championship team. Police asked the public to watch for them.