Hacker News headline The travel agency of one of the largest travel agencies in the US has shut down.

The company, American Express, said on Tuesday that it had suffered a cyberattack.

It said in a statement that the company has been locked down in the United States due to the threat of a breach and is not available to provide support to anyone.

The statement from American Express reads:We are in constant communication with our customers to provide them with the information they need to help manage their financials and their lives in the face of a severe cyber attack.

The statement also said American Express is in active talks with the US government about securing its networks.

American Express has about 6.8 million members worldwide, according to its website.