A man died on the floor of a department store during the US's busiest shopping day - and other shoppers reportedly ignored him.

Walter Vance, 61, was buying Christmas decorations at Target just after midnight when he collapsed from a heart attack.

Black Friday shoppers line up outside a Kmart store in Salem, Oregon. Credit:AP

Witnesses saw shoppers walk around and over Mr Vance's body, WSAZ TV in West Virginia reported.

An off-duty nurse and paramedic eventually came to Mr Vance's aid, but he died after being taken to hospital.