HONOLULU (KHON2) -- Ongoing negotiations took place on Thursday between locked-out nurses and Kapiolani Medical Center, with a federal mediator joining the talks. Get Hawaii's latest morning news delivered to your inbox, sign up for News 2 You The two sides began discussions at 11 a.m. About 600 union nurses had been locked out since a strike on September 13. Additionally, the state Department of Health investigated complaints against Kapiolani Medical Center for Women and Children. Travel nurse fired amid Oahu nurse strike, lockout The department's Office of Health Care Assurance confirmed it looked into two anonymous complaints. The Department of Health stated that the investigation was part of standard operating procedures. In response, Kapiolani Medical Center said it was not unusual for the Department of Health to visit healthcare facilities and that it was cooperating by providing the requested information. Download the free KHON2 app for iOS or Android to stay informed on the latest news The hospital emphasized its commitment to delivering quality care to the community.