The director of the National Atomic Museum in New Mexico said the decision had been made because of sensitivity around the current anniversaries of the attacks.

Anti-nuclear activists in Japan were outraged when they saw the miniature replicas advertised on the museum's Internet site.

The museum said the earrings sold out on Friday and it had no plans to restock them.

Ceremonies were held in Hiroshima on Friday to mark the 54th anniversary of the attack, which killed some 140,000 people out of an estimated population of 350,000.

A larger bomb dropped on Nagasaki three days later effectively sealed Japanese surrender and ended World War II.

Internet sales

The US National Atomic Museum in Albuquerque had sold the "Little Boy" and "Fat Man" earrings, named after the bombs dropped on the two cities, at $20 for a pair of one of each.

Thousands of people marked the anniversary

In the "Museum Exclusives" section of its Website, it boasted: "Where else will you find a pair of Fat Man and Little Boy earrings?"

"It's blasphemy," Kazuya Yasuda, an official at the Japan Council Against Atomic and Hydrogen Bombs, said.

"It just debases the feelings of those who suffered from the Hiroshima and Nagasaki bombings."

Japanese anti-nuclear activists were also outraged, describing the sale as "unforgiveable".

"We're very angry," said Naomi Kishimoto of Hiroshima's anti-nuclear group Gensuikyo.

"It's not the sort of thing you should be hanging from your ears or using to decorate your desk."

A spokesman for the museum, which is owned by the US Department of Energy but run by a subsidiary of defence company Lockheed Martin, said the earrings commemorated the work of scientists that helped save the lives of American troops.

Anniversary

An estimated 50,000 people gathered along with Japanese Prime Minister Keizo Obuchi in Hiroshima's central Peace Park, near the site of the 1945 explosion.

People made offerings of flowers and lit candles, while others brought thousands of folded paper cranes as a symbol of peace.