(CNN) North Carolina authorities are investigating a shooting that unfolded shortly after midnight inside a Salisbury restaurant, leaving nine people injured, at least six of them from gunfire, police said.

Sunday's incident happened after a party at Thelma's Down Home Cooking, located on a commercial thoroughfare in the city of 34,000 located about 45 miles northeast of Charlotte.

One victim was shot in the chest, Salisbury police said in a statement, while five others were treated for gunshot wounds at Rowan Regional Medical Center. A seriously injured victim was flown to Wake Forest Baptist Hospital in Winston-Salem, the statement said.

The most seriously injured victim is in stable condition, police said.

Two people suffered trampling injuries, while one person was treated for anxiety, police said.

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