Following up on 
this morning's news that Sony Online Entertainment servers were offline across the board, Japanese newspaper Nikkei reports (via 
BGR)
 that the company has lost 12,700 customer credit card numbers as the 
result of an attack. The company apparently took SOE servers offline 
after learning of the attack last evening, but has yet to issue a 
statement confirming that customer information has been lost.
Of the 12,700 total, 4,300 are alleged to be from Japan, while the 
remainder's origins are unknown. The report also notes that most of the 
numbers are said to be from expired cards, which 
Engadget posits could mean this was simply stolen data from an old backup.
The report doesn't mention whether last night's supposed breach is connected to the 
recent incidents
 involving Sony's PlayStation Network and Qriocity services, though an 
SOE representative told Joystiq that official comment would be coming 
from the company "within the hour."