TUCSON, Ariz. — TUCSON, Ariz. - Tucson Police are have arrested three men that are believed to have been involved in a homicide that happened at an east-side Walmart near Speedway and Kolb early this morning.

The three arrested are 19-year-old Eduardo Carranza and 18-year-old Francisco Morales, and a 17-year-old juvenile.

Per TPD, Eduardo Carranza was arrested and charged with 1st Degree Murder, Attempted Armed Robbery and Attempted Aggravated Robbery. Francisco Morales was arrested and charged with Theft of Means of Transportation.

The juvenille was booked into Pima County Juvenile Correction Center on felony charges.

According to Tucson Police. The incident happened around midnight, and was gang related.

The timeline from this morning went like this:

Sgt. Dugan with TPD says officers arrived on scene and located a young man with obvious signs of gunshot trauma. The man, now identified as 18-year-old Jaun Andres Allen, was pronounced deceased shortly after. Next of kin have been notified.

After the shooting incident, police learned an SUV fled the scene after the shooting occurred, leading to officers finding the vehicle in the 8600 block of east Old Spanish Trail.

Officers approached the vehicle, which was still occupied, and detained the people inside.

Early information says the SUV had been in the Walmart parking lot before the incident, which was occupied by several individuals including the now deceased man, who police are calling the suspect of this incident.

Dugan says the suspect got out of the SUV holding a gun and approached another vehicle with a man inside. This lead to an altercation involving gunfire that killed the gunman who approached the car. The other man, who police are calling the victim, stayed on scene to cooperate with police.

Gang Detectives with TPD are continuing to investigate this incident. Anyone with additional information about this incident is asked to call 88-CRIME. You can remain anonymous.