New York ( CNN ) -- New York Attorney General Eric Schneiderman is investigating whether New York utilities Long Island Power Authority and Consolidated Edison adequately prepared for and responded to Superstorm Sandy , according to a source with knowledge of the investigation . On Wednesday , the attorney general 's office subpoenaed LIPA and ConEd requesting information about what they did to brace their systems ahead of the storm and their management in its wake , the source said . The investigation , which began November 5 , is examining whether ConEd , as a publicly traded investor-owned utility company , breached the Public Service Law , which requires gas and electric companies to `` supply safe and adequate service . '' HonorÃ© : Sandy recovery is stumbling . Schneiderman 's office is questioning whether LIPA , which was created under the Public Authorities law , violated its legal obligations to ensure a safe and dependable flow of electricity . The attorney general is also studying disclosure statements LIPA made to bondholders regarding the ability of their power systems to weather severe storms , the source said . Elizabeth Flagler , a spokeswoman for LIPA , said in an e-mail to CNN , `` We have reviewed the AGs subpoena and intend to comply with it in all respects . '' Joy Faber , a spokeswoman for ConEd , said the company is cooperating with the investigation . `` We look forward to reviewing the company 's storm preparations and response with the Attorney General and all interested parties , '' she said . On Tuesday , a lawsuit was filed by two residents , claiming LIPA and its partner , National Grid , committed `` gross negligence , breach of contract , and fraud , '' according to attorney Ken Mollins , who is representing the plaintiffs . Also on Tuesday , amidst heavy criticism of his company 's handling of the storm , Mike Hervey , chief operating officer of LIPa , said he would resign , effective at the end of the year . It 's a hard slog back to normalcy . Scammers create fake websites for Sandy victims . Sandy amplifies struggles for low-income families . Map : See images of destruction , recovery across the East Coast . CNN 's Randi Iaboni contributed to this report .
Long Island Power Authority and Consolidated Edison being investigated . New York Attorney General Eric Schneiderman 's office subpoenaed LIPA and ConEd . Comment: Office wants to know what they did to prepare and handle aftermath . LIPA and ConEd have indicated they will cooperate with the investigation .