ROSEVILLE, Calif. (AP) _ Railroad workers discovered eight more Vietnam War-era bombs Saturday, nearly two weeks after finding a similar bomb in the same yard.

The site was near an area where a train load of bombs exploded 24 years ago.

The discovery on Oct. 6 near Roseville in Sacramento County prompted authorities to evacuate about 400 people. The bomb, about 5 feet long and as much as 500 pounds, was moved to a nearby field and detonated. There were no injuries or damage.

Authorities planned a similar evacuation of residents for late Saturday night or Sunday morning, sheriff's spokesman Jim Cooper said.

Sheriff's officials said a military bomb squad from Moffett Field in Mountain View was called to the site at the Union Pacific rail yard.

The bombs were discovered Saturday afternoon by railroad workers replacing tracks at the railroad yard, which is being renovated. Union Pacific workers tearing up tracks also found the earlier bomb.

Six of the bombs were described as being in good condition. The other two were badly damaged by earth-moving equipment. All were described as dangerous.

``They are intact,'' Cooper said of the six bombs. ``They look like the bomb that was found last time.''

On April 28, 1973, a train carrying ammunition bound for the Vietnam War exploded in a day-long series of blasts. No one was killed.