Mike Zukerman / WFAA-TV

A security guard opened fire in the supermarket's parking lot.

FORT WORTH — A man suspected of stealing may have been fatally shot outside a Fort Worth grocery store after he was followed to his car.

The incident began after a Sack 'n Save manager became suspicious of a man exiting the store who he believed was carrying stolen merchandise at around 8:25 p.m., authorities said.

The manager followed the man into the store's parking lot in the 3400 block of Altamesa Boulevard and confronted him as he got into a white truck.

As the manager attempted to detain the man, the suspect began to drive off. A security guard, who had walked outside to check on the manager, said the truck drove straight towards him, which was when he fired a shot at the vehicle. The truck fled the scene.

Authorities later discovered a man was admitted with a gunshot wound to the Huguley Hospital in Fort Worth. The man, who police believe may have been the driver of the white truck, was pronounced dead at the hospital.

WFAA-TV photojournalist Mike Zukerman and WFAA.com's Marjorie Owens contributed to this report