Days after an 18-year-old allegedly shot and critically injured a security guard on a movie set in south Fulton County, police now say he robbed and killed a man at a gas station in Clayton County.

Daijon Tyes was arrested Wednesday in Clayton County, hours after Union City police named him a suspect in the shooting of 28-year-old Tomesha Brown, who was working as a security guard for a movie being filmed Friday at the Citizens Lanes Bowling Alley.

Daijon Tyes

Credit: Clayton County Sheriff's Office

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Credit: Clayton County Sheriff's Office

Union City police spokesman Officer Jerome Turner said Thursday the teen was facing murder charges in connection with Wednesday afternoon’s gas station robbery and shooting.

“He committed a homicide in Clayton County,” he told AJC.com. “Clayton County Sheriff’s Office is handling that case.”

According to the sheriff’s office, the deadly incident occurred at a Chevron in the 2600 block of Rex Road. Police and sheriff’s officials responded to the scene just before 3:15 p.m. and found an unresponsive man shot several times.

The man, identified by Channel 2 Action News as 28-year-old Christopher Barnes, was pumping gas when Tyes tried to rob him. Police told the news station that Barnes pushed Tyes, and the teeager then shot him.

Barnes was taken to a hospital, where he died.

A man was shot Wednesday at a Chevron gas station in the 2600 block of Rex Road. He later died at a  hospital.

Credit: Channel 2 Action News

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Credit: Channel 2 Action News

Investigators said Tyes took off running after the incident. A sheriff’s deputy spotted him and took him into custody following a chase. He had a handgun when he was arrested, according to the sheriff’s office.

A second suspect, 17-year-old Amourion Bruce, was also arrested after a high-speed chase with Union City police, officials said.

Amourion Bruce

Credit: Clayton County Sheriff's Office

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Credit: Clayton County Sheriff's Office

Tyes and Bruce are in the Clayton County Jail on charges of felony murder, malice murder and criminal attempt, records show. Tyes faces additional charges of obstructing an officer, carrying a concealed weapon and possession of a firearm during the commission of a crime.

Both men were denied bond during their first appearance hearings Friday in Clayton County, Channel 2 reported.

In the Union City case, Tyes is also charged with aggravated assault and possession of a firearm.

RELATED: 18-year-old arrested in security guard's shooting at Union City movie set

According to authorities in that city, three young men walked through the bowling alley parking lot, and a production crew member told them the lot was off limits. The men then walked off the property, but one of them started shooting, hitting Brown.

Tomesha Brown

Credit: Channel 2 Action News

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Credit: Channel 2 Action News

She had just arrived at work when the shooting happened.

Brown is on a ventilator in Grady Memorial Hospital’s intensive care unit, Turner said.

RELATED: Security guard in ICU after being shot while working on movie set in Union City