RALEIGH, N.C. (AP) — Police are investigating witness reports of gunfire that sent shoppers inside a busy North Carolina mall running in fear or hiding inside stores, as authorities say they haven’t confirmed what actually happened.

Pandemonium erupted Saturday afternoon and after several shoppers said they heard what sounded like gunfire inside Crabtree Valley Mall in Raleigh.

But police say they found no gunshot victim or shell casings from spent bullets.

Raleigh Police Chief Cassandra Deck-Brown told reporters “we are looking at all possibilities.”

Video posted on social media sites shows dozens of people running toward mall exit doors as numerous screams were heard. Eight people ranging in age from 10 to 70 were transported to hospitals for treatment of minor injuries suffered as they rushed to leave the mall, the police chief said.