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A sinkhole has collapsed part of the National Corvette Museum in Kentucky, damaging eight of the sports cars.
Museum spokeswoman Katie Frassinelli said six of the cars were owned by the museum and two - a 1993 ZR-1 Spyder and a 2009 ZR1 Blue Devil - were on loan from General Motors.
Bowling Green city spokeswoman Kim Lancaster said the hole opened up at about 5.40am on Wednesday (local time), setting off an alarm and a call to the fire department.
No one was in the museum at the time, Frassinelli said.
The hole is in part of the domed section of the museum, and that area will remain closed. That's an original part of the facility for which was completed in 1994.
Frassinelli said the rest of the museum was open.
The other cars damaged were a 1962 black Corvette, a 1984 PPG Pace Car, a 1992 White 1 Millionth Corvette, a 1993 Ruby Red 40th Anniversary Corvette, a 2001 Mallett Hammer Z06 Corvette and a 2009 white 1.5 Millionth Corvette.
Lancaster said information was still being gathered about what exactly happened, but it appeared to be the first incident of its kind at the property.
Bowling Green sits in the midst of the state's largest karst region - the Western Pennyroyal area, where many of Kentucky's longest and deepest caves run underground. A karst displays distinctive surface features, including sinkholes.
Frassinelli said a structural engineer has been called to the museum to assess existing damage and the stability of the surrounding area.
The museum is set to host the 2014 Corvette Caravan in September, a celebration marking the building's 20th anniversary.
Museum officials expect car clubs from all 50 states and Canada to converge on Bowling Green for the celebration.
Bowling Green Kentucky is the sole place where General Motors builds the iconic Corvette.