OAKLAND -- Seven vehicles were involved in a chain reaction series of wrecks Monday morning near the Claremont Hotel that police attributed to black ice conditions.

No one was hurt but at least three of the vehicles had major damage. Some of the vehicles were cars and the others SUV's.

The crashes happened about 8:28 a.m. at Claremont Avenue and Stonewall Road, where there is a curve in the road, police said.

Most of the vehicles involved were going southbound on Claremont. At least one vehicle going northbound on Claremont was struck by a southbound vehicle that spun out after being hit.

A Moraga woman driving one of the cars that was damaged said she has commuted on Claremont for 16 years. She said she was trying to slow down for the curve in the road but her brakes would not work because of the black ice on the pavement causing her to begin sliding and hit another vehicle in front of her.

At least three cars were being towed from the scene.

The street was not closed but police put out flares and were stopping people to alert them of the hazard.

There was a similar problem involving black ice in the 5500 block of Moraga Avenue in Oakland but no accidents were reported.