RED BLUFF, Calif. -

Part of a historic tree came crashing down Sunday morning.

Workers at the Ide Adobe State Park in Red Bluff said several branches from a 350-year-old oak tree fell around 9:15 a.m. Sunday.

The tree shaded a historic adobe structure at the park.

The branches caused significant damage to that structure and several other buildings in the park.

No one was injured.

Park staff said they are working to secure the site and repair the damaged buildings.

It is unclear what caused the tree to fail.

Staff said throughout the years efforts have been made to keep the tree part of the park's history, including regular inspections, cabling of limbs and trimming as needed.

The historic section of the park will remain closed until further notice. The visitor's center and day use picnic area will remain open at normal hours from 10 a.m. to 4 p.m.