In an outbreak of cross-border unity, seven cases of salmonella have been confirmed in people who attended a Memorial Day weekend concert at the Gorge Amphitheater, three from Washington state and four from British Columbia.

The Grant County Health District announced Friday that Tom Petty had nothing to do with the salmonella as there were no cases associated with his concerts two weeks later on June 11-12.

Health district food inspectors were at the amphitheater Friday to ensure Lilith Fair didn’t make anyone barf and to monitor food handling practices.