Just a few feet away from Tina Scalise's family plot in Hazelwood's Calvary Cemetery, headstones lay cracked in the grass, remnants of vandalism that occurred Tuesday night.

Luckily, the graves of her grandfather, father and uncle were unscathed.

"I'm so glad that we weren't affected," said Ms. Scalise, who visited the cemetery yesterday morning to check the graves. "We've been worried sick."

Cemetery workers discovered Wednesday morning that vandals had toppled 89 tombstones, damaged flags and flowers, and left beer cans strewn about the cemetery. The cemetery contains nearly 150,000 interments.

"It's simply an outrage," said Lawrence Domencic, director of operations. "To have one of our sacred places desecrated is especially disconcerting."

According to Mr. Domencic, the vandalism was confined to certain sections of the cemetery, and graves appear to have been targeted randomly.

"It looks as if people went down each side of the road, pushing stones down."

Workers will begin uprighting the toppled tombstones next week. Any damages to the headstones are the responsibility of the families, though homeowners insurance may cover the costs, Mr. Domencic said.

The extensive damage has left everyone involved shaken and overwhelmed.

In just half a day, Family Service Counselor Glen Connell estimates 500 people have called to ask about their relatives' graves.

Employees are also trying to identify the toppled tombstones and contact family members.

Calvary Catholic Cemetery was founded in 1886 and contains many notable burials, including actor Frank Gorshin and former Pittsburgh Mayors Richard Caliguiri, David L. Lawrence and Bob O'Connor.

Based on the extent of the damage and the weight of the tombstones, more than one person was probably involved, said Pittsburgh police spokeswoman Diane Richard.

According to Officer Robert Morgan, police have no leads so far and are investigating the incident.

The Catholic Cemeteries Association has posted photographs of the toppled tombstones on its Web site to help identify the affected families.

Anyone with information about the vandalism is asked to call Pittsburgh police at 412-422-6520.