A 56-year-old woman has died after falling into an open maintenance hole on a busy New York City street. Police say she was exiting her SUV near Fifth Avenue and East 52nd Street in Midtown Manhattan when she fell into the hole late Monday night. She was pronounced dead at a local hospital. It remains unclear why the hole was uncovered. Con Edison is investigating the accident and has expressed condolences to the family. The woman's relatives told WABC-TV they were shocked and saddened by her death, and are seeking more information. The city's chief medical examiner's office will determine the cause of death.