St. Joseph, Mo. ? More than 300 tombstones or obelisks have been damaged or destroyed at Mount Mora Cemetery in St. Joseph, one of the few cemeteries in the state that is on the National Register of Historic Places.

Among the monuments damaged was one to Silas Woodson, governor of Missouri from 1873-1875.

St. Joseph police arrested two adults and two juveniles Wednesday.

Two other juveniles already were in custody.

No charges have been filed, but police plan to present a case to Buchanan County prosecutors today.

The damage totaled at least $30,000, but police said Wednesday the number is expected to climb once estimates from more-elaborate tombstones are completed.

“I’ve never seen damage like this in my 22 years in the business,” said Mike Forbes, an executive with SI Memorials in Overland Park.

His company is working with the Wilbert Vault Co. of St. Joseph to prepare a bid to repair the tombstones and obelisks that were damaged and knocked off their pedestals in late September and last week.

The cemetery, which has struggled to meet expenses, was put on the National Register of Historic Places last summer.

The cemetery will file an insurance claim, said Dr. Huston Wyeth, the chairman of the cemetery board.

“The town ought to know that things like this happen,” said Wally McDonald, a cemetery board member. “This is crazy; they (the vandals) really did a malicious number on them.”

The stones, some weighing 750 pounds or more, were scattered throughout the cemetery.

One damaged stone of polished granite was estimated to weigh more than a ton, Forbes said.

The vandals sawed off metal bars on one tomb, opened a window and threw funeral materials about.

On a child’s grave that was more than 100 years old, the lamb that had rested on top of the stone had been beheaded. Several large stones in the shape of crosses also were toppled.

“Is nothing sacred anymore?” McDonald asked. “It’s like a hurricane went through here.”