Police say a medical marijuana sale gone awry early this morning led to the fatal shooting of a man in Denver.

The incident happened at about 12:25 a.m. at a home on the 2600 block of Leyden Street, said Sonny Jackson, a Denver Police Department spokesman.

When officers arrived, they found an unidentified man who was shot in the head, Jackson said. He was pronounced dead at the scene.

A short time later another man walked into Denver Health Medical Center to be treated for a gunshot wound.

Investigators believe the shooting victims are linked and that the two men were “conducting a medical marijuana transaction at the residence when an altercation occurred,” Jackson said.

Police are investigating the incident as a homicide; the injured man is being held as a suspect in the fatal shooting.

Kieran Nicholson: 303-954-1822 or knicholson@denverpost.com.