US forex broker FXCM has been hacked

Online foreign exchange market broker FXCM said Thursday it had been hacked in an intrusion that saw money withdrawn from some customer accounts.

"At this time FXCM has identified a small number of unauthorized wire transfers from customer accounts," the company said in a statement.

But it added that all the money has been returned to the raided accounts and the affected customers have been notified.

FXCM said it had received an email from a hacker claiming to have access to customer information.

The company said it notified the FBI and also launched its own investigation with what it called a leading cybersecurity firm to determine the scope of the hacking.

Hacking involving blackmail against companies is on the rise, such as the recent intrusion of the extramarital affair-arranging website Ashley Madison. 

The Paris-based Organization for Economic Cooperation and Development called Thursday on corporate executives and governments to treat risks associated with computer security not as a technical issue but rather as an outright economic risk.