One person has been killed and another injured in a shooting in the car park of a Macy's department store on one of the busiest shopping days of the year.

The shooting took place outside the US-chain in Hamilton Mall in Mays Landing just before it was set to open its doors for Black Friday sales at 1am (EST) on 25 November.

According to the New York Post, the deceased is believed to be a 20-year-old man who had sustained multiple gunshot wounds.

The other casualty is reported to be the victim's 26-year-old brother. He is being treated for a gunshot wound in his leg. It is believed the shooter is still at large.

One witness at the scene was quoted by CBS 3 as saying the shooting was a tragedy. "We've been doing this, me and my girls, for probably about ten years now, just for the fun of going out – a girls night and trying to get some special sales and it's getting scary now," she said.

"It's very scary you know," another witness said. "You're starting off the holiday season and you're excited about the upcoming times with family and now there's going to be family who are missing people and their holidays will never be the same."