Mountain View police are puzzling over how a burglar managed to get into an apartment located in the 2000 block of W. El Camino Real on Jan. 5.
The apartment, which was locked when its tenants left it at 9:45 a.m., was found ransacked when they returned at around 5:45 p.m., police spokeswoman Liz Wylie said.
The victims, a husband and wife, along with a friend who was staying with the couple, reported that more than 50 items of jewelry were stolen, along with an iPhone, four laptops, a Sony Playstation, a Nintendo Wii, numerous games for both systems, two digital cameras, clothing and a gym bag.
No signs of forced entry were discovered, Wylie said, and the second-floor apartment's only entrance, the door, was locked when the couple returned.
Police have no suspects and say they have no idea how the apartment was broken into, Wylie said.