The officers approached the man and saw he had a gun in his waistband. When the man did not comply with police orders, one of the officers shot and killed him, Nelson said.
Police neither identified the officers involved nor the victim.
12:05 a.m.: An officer-involved shooting has been reported near a concert venue at the Farmers Public Market, 311 S Klein, in Oklahoma City.
Chicago-based rap artist Chief Keef was scheduled to perform Thursday night at the venue, according to MTV.com.
A man who was at the concert and went outdoors said he heard eight shots fired about 10:30 p.m. He said it appeared police were shooting into a vehicle, which he described as an Oldsmobile Cutlass.
Oklahoma City police have blocked off an area near the shooting at SW 2 and Klein. Officers haven't yet spoken to the media.
Check back with NewsOK.com for updates on this breaking story.