New York Attorney General Eric Schneiderman has opened an investigation into the packaging of mortgage loans into securities, in the latest sign of increased scrutiny of the mortgage industry. Mr. Schneiderman will hold meetings with executives of several major banks, including Bank of America Corp., Morgan Stanley and Goldman Sachs, according to people familiar with the investigation. He intends to discuss securitization of mortgage loans and other mortgage practices and has requested related documents from the firms, these people said. The meetings over securitization are expected to happen in the coming week.