LONGMONT, Colo. (AP) -- Authorities have released the name of a 20-year-old man who was found dead in a ditch that runs through a Longmont park.

The Boulder County Coroner's Office identified the man as Manuel Garcia-Silva of Longmont but did not say how he died.

Witnesses told police they saw Garcia-Silva strip nude and run around shortly after bars closed early Thursday morning. The Longmont Times-Call reports (http://bit.ly/16zYmII) his body was found in Oligarchy Ditch along the east side of Lanyon Park at about 7 p.m. Thursday.

Police Cmdr. Jeff Satur says there were no signs of trauma on Garcia-Silva's body, so the coroner's office is investigating whether he suffered from a medical condition or an adverse reaction to drugs.