An angry customer shot a teenage fast-food worker after being served the wrong sized drink.
The 16-year-old Wendy's employee was hit in the shoulder after the customer fired through the drive-thru window.
Another employee, a 17-year-old, was grazed in the shooting but didn't require hospital treatment.
A friend of the older victim said that the gunman opened fired after not getting what he ordered.
Not wanting to give her name, she said: “He ordered a large, he got a small, he came back around and shot.
“It's a neighbourhood and it's a busy area, and there's kids walking by left and right. Can't do that, just can't do that.”
Emergency services rushed to the scene on February 8 at the branch in Lynn, Massachusetts, US.
More than six police cars blocked off the area.
Police have confirmed a male employee was shot through the drive-thru window and it came after some kind of dispute.
Footage taken at the scene appears to show two bullet holes piercing the Wendy's drive-thru window.
The 16-year-old victim was rushed to Massachusetts General Hospital but thankfully is expected to make a full recovery.
A statement from Wendy's read: "We are deeply disturbed by this senseless act of violence, and we are grateful to the first responders who acted quickly in this situation.
"We will work with local law enforcement as they continue their investigation."
"Our number one priority is the safety of our employees and customers," the written statement continued.
An employee at the Burger King next door said the shooter was parked up in a vehicle in the drive-thru.
Investigators remained at the scene for two hours gathering evidence and speaking to witnesses.
In June 2022 a young worker at a Subway fast food restaurant was shot and killed after a customer pulled out a gun and opened fire because they were angry over the amount of mayonnaise on their sandwich.
The shooting has left cops in the US city of Atlanta shocked, with one senior officer calling the incident 'ridiculous'.
Police were sent to a petrol station following reports a person had been shot.
When they arrived, horrified officers discovered two women had been attacked in a dispute over a sandwich, Local news channel WSB-TV reported.
One of the young women died and another female worker was seriously hurt in the bloodbath.
“It just breaks my heart to know that someone has the audacity to point a weapon, and shoot someone for as little as too much mayonnaise on a sandwich,” takeaway co-owner Willie Glenn said.
