GEORGE, Wash. (AP) — The Grant County Sheriff’s Office in Washington state believes its deputies stopped a man from carrying out a mass shooting at the Gorge Amphitheater Friday night. KOIN-TV reports the sheriff’s office said witnesses and security personnel told them at around 9 p.m. of a man in the parking lot who inhaled an unknown substance from a balloon and then loaded two 9mm pistols. Witnesses told investigators the man put one gun in his waistband and the other in a holster. Witnesses say he approached concertgoers and asked when the concert ended and where they would be exiting. The sheriff’s office said the man was stopped by security outside the gates and disarmed.