North Texas football coach Dan McCarney was admitted to a hospital Sunday and is undergoing a battery of tests.
"The exact cause and nature of the symptoms of his illness are not immediately known by us at this time," UNT athletic director Rick Villarreal said in a statement. "The family has asked until a complete diagnosis and a course of treatment is established that their privacy be respected. We can't comment any further at this time and will release information as it becomes available and approved by the family."
McCarney, 58, is entering his second season at North Texas. The Mean Green went 5-7 in 2010, the program's best season since it made the final of four consecutive New Orleans Bowl appearances in 2004.
McCarney was Iowa State's head coach from 1995-2006, making him the longest-tenured coach in that program's history. He holds the Iowa State record for wins (56) and led the Cyclones to the first two bowl wins in school history.
Tim MacMahon is a reporter and columnist for ESPNDallas.com.