LIVERMORE -- A group of thieves drove a car through the front of a fine jewelry store Monday and made off with $100,000 worth of precious jewels they carefully selected from the shattered cases, police said.

Livermore police were alerted to an alarm at the Kay Jewelers inside the Paragon Outlets and arrived about 3:45 a.m. to find the full facade of the store had shattered onto the sidewalk, Lt. Matt Sarsfield said. Once inside, officers found several cases smashed and emptied of their contents while other cases remained untouched.

According to Sarsfield, a surveillance video from inside the store shows the drawn blinds moving backward and glass shattering into the business, indicating that the suspects drove a car through the front glass doors to gain entry into the business. The car then backed up and plowed through the doors a second time, and all three suspects -- clothed in dark hooded sweatshirts, masks and gloves -- rushed into the store toting sledgehammers.

Sarsfield said the video showed the suspects removing a sheet from the top of each case, smashing them with their weapons and carefully picking through them. While the suspects were only inside the business for about four minutes, Sarsfield said, they made off with about $100,000 worth of jewels.

"It looks like they were kind of selective. They reached in, and they were grabbing specific things," Sarsfield said. Some of the cases they walked right past, and the next one they'd smash. They were looking for specific high-end jewelry."

The owners of the Kay Jewelers outlet remained on scene throughout the day taking inventory of the stolen jewels, Sarsfield said. Managers on duty Monday afternoon declined to comment on the incident.

While Paragon Outlets' on-duty security did not see or hear the commotion, the two guards did see the two suspect vehicles, a compact white station wagon and white and tan sedan, peeling out of the outlets at high speed, police said. It was not immediately clear which of the vehicles crashed through the front of the store, since the drawn blinds obscured the front of the vehicle.

No suspect description was immediately available pending further review of the tapes. In addition to the hoodies, masks and gloves, Sarsfield said two of the suspects had long pants on, and one was wearing shorts.

Livermore crime scene investigators are processing the scene for evidence, Sarsfield said, and possible car parts left on the sidewalk may also provide further leads.

Follow Erin Ivie at Twitter.com/erin_ivie.