A Walmart employee says the retail giant fired him after he tried to help a woman being attacked in the parking lot of a southeastern Michigan store.

Thirty-year-old Kristopher Oswald tells WXYZ-TV the Hartland Township store's management gave him paperwork saying it was dismissing him for policy violations. Oswald says he was on break about 2:30 a.m.Sunday when he saw a man grabbing a woman.

He says he asked her if she needed help and the man started attacking him. Oswald says he was able to get on top of the man, but two other men started attacking him.

Livingston County sheriff's deputies arrived and halted the fight. A spokeswoman for Bentonville, Arkansas-based Walmart said Thursday that while the company understood Oswald's intentions, his actions violated company policy.