A fire raced through a barn in Lexington, killing seven horses worth a total of more than $1 million.

The fire destroyed the 12-stall barn at Hipp Farm, a division of Clifton Farm, in Lexington. The cause of the fire remains under investigation, fire officials said.

Calhoun Clifton, the 23-year-old daughter of the farm's owner, said the blaze killed champion saddlebred Chat, Maui Girl, the dam of a world champion, and five other horses.

Maui Girl was one of the first saddlebreds to be sold for more than $1 million, Clifton said.

"We never even considered putting a price on them, and that is pretty rare for our family because this is what we do for a living," Clifton said. "... They have just been a part of this family for as long as we have had them. There is no amount of money we would have ever sold them for."

Firefighters responded to the fire at 1:12 a.m. Friday, Fire Battalion Chief Steven Sea said.

The fire did not spread to two nearby barns or the house, which is 500 yards away, Clifton said.