Opponents of French plans to resume nuclear testing in the South Pacific claimed responsibility Sunday for the second arson attack in a month against a French high-speed train.

No one was hurt, but damage was estimated at more than $850,000.

Swiss police were alerted to the burning train here in the capital shortly after 3 a.m Sunday. An engine room was destroyed and several cars were badly damaged by what police described as Molotov cocktails.

The TGV, or high-speed, trains operate on several runs between France and neighboring Switzerland. Reaching speeds of up to 185 mph, they are the pride of the French railway system.