Benjamin P. Flanagan, 29, and Erica C. Ford, 26, both of Crocus Terrace in Ashburn, were arrested and charged with disorderly conduct and theft after police said they tried to hide the guitar under their car, according to Pfc. David Proulx, a police spokesman.

At about 10 p.m. near the end of the June 8 concert which featured The Killers, Regina Spektor, Keane and Louis the 14th, a member of The Killers told security that a man had jumped on stage and grabbed a black and white Fender bass guitar valued at $4,500 belonging to band member Mark Stoermer, according to a police report.

"When The Killers took the stage they noticed [the guitar] was missing and told security guards," Proulx said.

Brad Canfield, assistant general manager at Merriweather Post, was approached by a member of the band and notified about the missing instrument, the police report said.

Moments earlier, Canfield had spotted a man walking through the packed crowd carrying a bass guitar, the police report said.

That's when Canfield radioed his staff to notify them of the missing instrument and also contacted police who were working at the concert, the police report said.

Shortly thereafter, a man was seen passing a guitar through a break in the parking lot's fence, the police report said. As a staff member noticed the incident, a woman attempted to distract a nearby security guard, the report said.

Police arrested Flanagan and Ford in the parking lot. The guitar was recovered under a 2000 Mitsubishi Montero Sport registered to Ford, the police report indicated.

The Killers performed a full set of songs at the event, despite the guitar incident.