MAPLEWOOD (AP) - The Ramsey County Attorney's office says no charges will be filed against police who struggled with a hospital patient who died after he attacked nurses in November.

Investigators say 68-year-old Charles Emmett Logan swung a metal bar at nurses at St. John's Hospital in Maplewood. Logan ran away but was subdued and handcuffed by officers.

Logan became unresponsive and was pronounced dead at the hospital. The county attorney's office says it's unclear if the use of force played a role in Logan's death.

Investigators believe an officer and two sheriff's deputies acted appropriately when they tried to deliver an electric shock and wrestled Logan to the ground.

An autopsy found Logan's death may have been due to "excited delirium." He also had an enlarged heart and suffered from hypertension.