Two people are dead, a third person is injured and a suspect is in custody following a Sunday night shooting at a bar in the Redland area, according to the Miami-Dade Sheriff's Office.

Paul Edward Koch, 62, was arrested and charged with two counts of second-degree murder with a weapon, MDSO said. According to the arrest affidavit, Koch was involved in a physical altercation with another patron at Club Glades, located at 18401 SW 256th St., around 8:47 p.m. on Sunday. 

Security staff escorted Koch out of the venue, but he returned shortly after with a handgun retrieved from his vehicle, the report stated. 

Investigators said that when Koch was confronted outside by one of the victims, he opened fire, fatally shooting him. He then moved toward the outdoor bar area and shot and killed a second victim. Neither victim was armed, and neither appeared to have provoked Koch before the shooting, authorities said.

A bar employee told CBS News Miami the night took a violent turn when a Koch became upset, left the bar to retrieve a gun from his car, and opened fire. The employee also said that friends of the alleged shooter restrained him until police arrived. 

Video captures the moment before gunfire erupts

A video that captured the moments prior to the shooting showed a heated exchange between a person and the alleged shooter, Koch, who was being held down on a table before getting up. Another customer is seen on video being held back. 

"A fight broke out, and the owner of the place kicked out the guys that were fighting," a witness told CBS News Miami. "One of them went back to his car, grabbed a gun and started shooting." 

Nicole Terrell said one of the victims was her friend, Marc Hess. She said the argument that eventually ended her friend's life was over a spilled drink. 

"When we were told last night it was almost like:'am I dreaming?' It's just really unfortunate, it hits close to home," Terrell said. 

Surveillance footage and body-worn camera recordings also reportedly captured the incident.

Authorities seized a semi-automatic handgun from Koch, who was taken into custody without further incident. He is being held without bond pending a court appearance.

Officials also confirmed that a good Samaritan was airlifted to Jackson South Medical Center after accidentally shooting himself during the incident.