American heavy metal band Metallica has stumped up 50,000 dollars in reward money for a fan who disappeared at one of their concerts, a campaign website said Monday.

Police have been searching for blond-haired, blue-eyed Virginia Tech student Morgan Harrington, 20, since she went missing from a Metallica concert in Charlottesville, Virginia on the evening of Saturday, October 17.

Campaign website 'findmorgan' said Harrington's parents were offering 100,000 dollars for the safe return of their daughter or for information leading to the arrest of whoever is responsible for her disappearance.

- The Band Metallica is also adding an additional 50,000 dollars to the reward bringing it to 150,000 dollars for Morgan's safe return or information leading to the arrest and conviction of the person or persons responsible for Morgan's disappearance - it said.

Metallica has also posted an appeal on its official website along with photos of Harrington under the headline - One Of Our Fans Is Missing.-

- Morgan has blond hair and blue eyes, is 5'6", 120 lbs., and was wearing a black 'Pantera' T-shirt, black skirt, and black boots - the ad said.

- She was not carrying ID or a cell phone. Morgan was separated from her friends shortly before 9:00 pm at the venue. -

Metallica urged anyone with information regarding the disappearance to come forward and also asked fans to check if Harrington can be seen in their photos and video footage from the concert.