WASHINGTON - The Federal Reserve says an internal website was briefly breached by hackers but no critical Fed operations were affected.

The Fed says the website contained contact information for more than 4,000 banking executives, including office and cell phone numbers. The information had been collected so the Fed could reach executives during natural disasters, such as hurricanes.

Fed spokeswoman Lisa Oliva says the hackers had exploited a "temporary vulnerability" in the website. She says the exposure has been fixed, the executives have been informed of the breach and it is no longer an issue.