A customer at a Foot Locker in L.A. was just viciously stabbed ... and it was all over a new shoe release.
Foot Locker did a release of Nike Dunks Wednesday, and there was a line outside the store on Melrose Ave. to get in for the hot new kicks. An eyewitness tells TMZ ... the stabber jumped the line and when 2 women who were also in line confronted him, he began beating both of them and stabbed one of them.
It appears from the images we've obtained she was stabbed in the abdomen.