CITIGROUP INC said a cyber attack in May affected almost twice as many accounts as the bank's figures had initially suggested, as major US lenders come under growing pressure from lawmakers to improve account security. A total of 360,083 North American Citigroup credit card accounts were affected by the breach, the third-largest US bank by assets said in a statement released late on Wednesday. Of those affected, some 217,657 customers were reissued with new cards along with a notification letter, while the remaining accounts were either inactive or had already received new cards earlier, the bank added. Reuters