Police say two Taiwanese men have been arrested on charges of planting bombs on a Taiwan high-speed train and at a lawmaker's office.

Taipei police chief Wang Cho-chun said the suspects were arrested by police in southern China's Guangdong province and repatriated to Taiwan Tuesday. He says police are questioning the suspects.

On Friday, Taiwanese police found two pieces of luggage each containing gas cans and timing devices on the high-speed train, and two other pieces of luggage containing similar devices at a lawmaker's office.

Police say the bombs failed to explode because their timing devices did not generate sufficient electric current to ignite the gas cans. They say successful explosions would have caused large casualties.