A US teenager has died after being shot in the head on the night of her prom, just a week before her high school graduation.

Last Friday, Morgan Dunston was a post-prom party in Pittsburgh, Pennsylvania, which took place in the car park of a community centre.

However, gun shots were suddenly fired and 18-year-old Dunston was shot in the head.

“Someone came up from behind and started shooting and my baby got shot,” Angie Krimm, the teen’s mother, told the Pittsburgh Post-Gazette of the incident.

The mum believes her daughter was just in the “wrong place at the wrong time, trying to enjoy life”.

Morgan Dunston with her twin sister Jordyn. (GoFundMe)

Despite being rushed to hospital, Dunston didn’t survive the injuries she sustained.

The teen’s family have been left devastated by her sudden death, especially her twin sister Jordyn, who is set to attend to university on a full scholarship later this year.

“She feels like, ‘If I go on and live my life, I am leaving my sister behind,’” Krimm told the publication. “And I said, ‘Jordyn, you have to do it for her. Because that’s what she would want you to do.’”

Dunston was expected to attend cosmetology school.

However, this isn’t the first time the family has been struck by a tragic death. Nearly 21 years ago, the remains of Krimm’s sister’s body were found after she vanished on June 30, 1998, according to People. Kimmie Krimm was 14 at the time, and had been heading out to go to the shops but didn’t come home. A few days after she vanished her remains were discovered in a cemetery.

Kimmie Krimm, Dunston's aunt, went missing in 1998 and her body remains were found. The cause of her death remains unsolved. (Facebook)

However, over 20 years after her death, it remains unsolved.

Angie Krimm’s mother, Jeanie, has likened the death of Dunston with her own daughter’s killing over two decades ago.

“Everything that Angie is saying right now, I said 21 years ago,” Jeanie admitted to WTAE-TV.

“I always said that we belonged to this club that nobody should belong to, and that’s the mothers who have to bury their children.”

So far no arrests have been made in connection with Dunston’s death, but her family has issued a plea for those who may have information to contact the police.