Chunks of ice breaking up along an Ohio river have pushed up into a cemetery and toppled dozens of headstones.

Authorities say some parts of the cemetery near Toledo are covered with pieces of ice stacked 4 feet high.

They estimate that about 90 percent of the headstones have been toppled.

The ice jams in low-lying areas along the Maumee (maw-MEE') River also damaged fences and trees in two parks.

A park official surveying the damage at a recreation area just south of Toledo says it could be more than a week before some areas reopen because there's so much ice blocking access to the park.

The owners of a horse farm in the path of the ice jam evacuated 20 of their horses over the weekend.