US lawmakers are pressing Sony Corp. for more information about the loss of personal data in a security breach that affected 77 million accounts on its PlayStation Network.

Rep. Mary Bono Mack (R-Calif.), and Rep. G.K. Butterfield (D-NC) sent a letter yesterday to the chairman of Sony Computer Entertainment America, Kazuo Hirai, demanding answers about when Sony discovered the breach and informed others, why it can’t determine if credit card information was stolen, and what steps it was taking to address the crisis.

The lawmakers sought a response by May 6, two days after a congressional subcommittee was to hold a hearing on proposed data security legislation.

Pressure is mounting on Sony to restore services and compensate players.