Three vintage Chevys -- two 1961 Impala convertibles and a 1957 Ber-Air -- were stolen from various auction areas over the Monterey Classic Car Week weekend, according to the Monterey Herald.
Two cars -- a white Impala and the 1957 Bel Air, cream-colored -- were stolen from the Del Monte golf course, where they were to be auctioned by Mecum Auctions, the newspaper reported.
The Bel Air was valued at $65,000. Both cars belonged to dealerships in the Midwest.
The other Impala, this one red with Idaho plates, was reported missing from a Fisherman's Wharf parking lot. It was valued at $220,000, the newspaper reported.
A spokesman for the California Highway Patrol said that it was the first theft in memory from the classic car auction week.
It's unclear how the thieves managed to get the cars. A media relations director for Mecum Auctions says that keys are not left in cars, and security guards are plosted day and night, the newspaper reported.
It's possible someone is targeting classic Chevys, the newspaper reported.